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[单选题]

如果$data=M(‘test’),怎么实现删除test表中的所有数据()。

A.$data->delete('1')

B.$data->where('1')->delete()

C.$data->delete()

D.$data->where('status=0')->delete()

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更多“如果$data=M(‘test’),怎么实现删除test表中的所有数据()。”相关的问题

第1题

So far there have not been definite data to confirm_________. A.where fewer pe

So far there have not been definite data to confirm_________.

A.where fewer people die from heart problem.

B.whether thev have the risk of heart attack,heart failure or stroke.

C.would probably have lower rates 0f heart disease.

D.how to test a person’s NT—pmBNP level in the blood by himself.

E.his heart muscle would be under pressure in some way.

D.that napping is 0f great benefit to women too.

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第2题

So far there have not been definite data to confirm__________. A.where fewer p

So far there have not been definite data to confirm__________.

A.where fewer people die from heart problem.

B.whether they have the risk of heart attack.heart failure or stroke.

C.would probably have lower rates of heart disease.

D.how to test a person’s NT—proBNP level in the blood by himself.

E.his heart muscle would he under pressure in some way.

D.that napping is of great benefit to woman too.

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第3题

听力原文:M: Hey, Michelle. Look what I just found. Right here in the sand.W: A piece of wo

听力原文:M: Hey, Michelle. Look what I just found. Right here in the sand.

W: A piece of wood? Oh. Driftwood. Interesting shape... Almost like some sort of modern sculpture.

M: Yeah. And feel how smooth it is.

W: Hmm, Must've been in the water a long time. It could've been drifting in the ocean currents for months, or even years.

M: In the currents? Doesn't the wind just blow things around out there?

W: Well, sure. But the currents are always moving, too. Almost like rivers, but underwater rivers, flowing through the ocean.

M: So how do they find out where these currents go? Stick a message in a bottle and throw it in the water?

W: Don't laugh. In fact, I was reading in a science magazine that oceanographers have released huge numbers of bottles into the ocean over the years. They wanted to map out where the currents would carry them.

M: Say, I'll bet-after they found out where all those bottles ended up-they could enter all that data in to a computer and make a pretty detailed model to... to show where the currents go.

W: In fact, they did. And they also found a neat way to test that model. There was a freighter carrying sneakers from a factory in Asia. It was caught in a big storm and thousands of pairs of sneakers got dumped in the Pacific Ocean.

M: Really? What a waste!

W: Yeah. Turns out, though, that hundreds of these shoes started washing up on beaches somewhere near Seattle, just about where the computer models had predicted the currents would carry them.

M: Gee. You mean all that stuff I find on the beaches might be part of some big scientific experiment? I thought it was all just trash!

(20)

A.Collecting objects on the beach.

B.Creating computer models.

C.Mapping currents in the ocean.

D.Tracking water pollution.

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第4题

Questions 1 to 10 are based on the passage you have just heard. Physical activity does t

Questions 1 to 10 are based on the passage you have just heard.

Physical activity does the body good, and there’s growing evidence that it helps the brain too. Researchers in the Netherlands report that children who get more exercise, whether at school or on their own, (1) to have higher GPAs and better scores on standardized tests. In a (2) of 14 studies that looked at physical activity and academic (3) , investigators found that the more children moved, the better their grades were in school, (4) in the basic subjects of math, English and reading. The data will certainly fuel the ongoing debate over whether physical education classes should be cut as schools struggle to (5) on smaller budgets. The arguments against physical education have included concerns that gym time may be taking away from study time. With standardized test scores in the U.S. (6) in recent years, some administrators believe students need to spend more time in the classroom instead of on the playground. But as these findings show, exercise and academics may not be (7) exclusive. Physical activity can improve blood (8) to the brain, fueling memory, attention and creativity, which are (9) to learning. And exercise releases hormones that can improve (10) and relieve stress, which can also help learning. So while it may seem as if kids are just exercising their bodies when they’re running around, they may actually be exercising their brains as well.

A)attendance

B)consequently

C)current

D)depressing

E)dropping

F)essential

G)feasible

H)flow

I)mood

J)mutually

K)particularly

L)performance

M)review

N)survive

O)tend

第1题答案是:

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第5题

Questions are based on the following passage.For years, high school students have received

Questions are based on the following passage.

For years, high school students have received identical textbooks as their classmates.Even asstudents have different learning styles and abilities, they are force-fed the same materials."Imagine adigital textbook where because I"m adifferent person and learn differently, my book is different thanyour book," said Richard Baraniuk, founder of OpenStax.

OpenStax will spend two years developing the personalized books and then test them on Houston-area students.The books will also go through a review and evaluation process similar to traditionaltextbooks.Baranluk expects 60 people to review each book before publication to ensure its quality.The idea is to make learning easier, so students can go on to more successful careers and lives.

Baraniuk isn"t just reproducing physical textbooks on digital devices, a mistake e-book publishers havemade.He"s seriously rethinking that the educational experience should be in a world of digital tools.Todo this means involving individuals with skills traditionally left out of the textbook business.Baraniuk iscurrently hiring cognitive scientists and machine learning experts.Baraniuk wants to use the tactics of Google, Netfllx and Amazon to deliver a personalized experience.These Web services all rely oncomplex algorithms (算法) to automatically adjust their offerings for customers.Just as Netlix recommends different movies based on your preferences and viewing history, a textbook might present materials at a different pace.The textbook——which will be stored on a range of digital devices——will automatically adjust itself thanks to machine learning.As a student learns about a topic, he or she could be interrupted by brief quizzes that evaluate, whether he or she masters the area.Depending on how the student does, the subject could be reinforce~l with more material.Or a teacher could be automatically e-mailed that the student is struggling with a certain concept and could use some one-on-one attention.This personalized learning experience is possible thanks to the wealth of data a digital textbook cantrack.This data can be used to better track students" progress during a course.Parents and teacherscan monitor a student"s development and provide in time more proper assistm ce.With personalizedlearning methods, our students" talents will be better developed.

What do we learn about personalized books? 查看材料

A.Their quality will be ensured since they are developed by OpenStax.

B.They will be examined and judged before being published.

C.They will overlook different learning styles and abilities.

D.They will be much similar to traditional textbooks.

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第6题

下列程序段的输出结果为【 】。 public class Test { void printValue(int m) {

下列程序段的输出结果为【 】。 public class Test { void printValue(int m) { do { Systern.out,println("The value is "+m); } while(-m>10); } public static void main(String arg[]){ int i=10; Test t=new Test(); t.print Value(i); } }

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第7题

听力原文:M: Except for the first question, the test was easy.W: But Mary told me that the

听力原文:M: Except for the first question, the test was easy.

W: But Mary told me that the test was very difficult.

Q: What did the man think of the test?

(14)

A.The test was considerably easy.

B.The test was tough.

C.The first question was hard.

D.All the questions in the test were easy.

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第8题

-I'm taking my driving test tomorrow. -______!A.CheersB.Good luckC.Come onD.Congratulation

-I'm taking my driving test tomorrow. -______!

A.Cheers

B.Good luck

C.Come on

D.Congratulations

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第9题

听力原文:M: I'm really worried the math test tomorrow.W: It's too late to worry about it n

听力原文:M: I'm really worried the math test tomorrow.

W: It's too late to worry about it now, Johnson.

Q: What does Johnson think about the test?

(8)

A.He's prepared for it.

B.He missed it.

C.It will be difficult.

D.He doesn't worry about it.

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第10题

听力原文:W:I'm afraid it will take at least three weeks to finish all the am4gnments. But
it's almost the end of the semester.

M: Fortunately, the final test will be held in five weeks.

Q:What do they say about the test?

(16)

A.It will take at least three, week, to finish the test.

B.The test will be more difficult than they expect.

C.They still have time to prepare for it.

D.The test will be more difficult than they expect.

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第11题

听力原文:M: Carol, you did very well on the test last week.W: I did ?Q: What is Carol's re

听力原文:M: Carol, you did very well on the test last week.

W: I did ?

Q: What is Carol's reaction to the news?

(18)

A.Disappointment.

B.Anger.

C.Surprise.

D.Worry.

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