There are ________ stars in the sky.
A.million of
B.millions of
C.the million
D.a million of
A.million of
B.millions of
C.the million
D.a million of
第2题
A.Karen's friend.
B.Karen's parents.
C.Karen's lectures
D.Karen herself.
第3题
A.It's windy.
B.It's cloudy.
C.It's rainy.
D.It's shiny.
第4题
已知系统的微分方程组的拉普拉斯变换式,试画出系统的动态结构图并求出传递函数。
X1(s)=R(s)G1(s)[G1(s)-G7(s)]G8(s)]C(s)
X2(s)=G2(s)[x1(s)-G6(s)X3(s)]
X3(s)=[X2(s)-C(s)G5(s)]G3(s)
C(s)=G4(s)x3(s)
第5题
以下程序段的输出结果是______。
char*s="12345";
s=s+2;
printf("%s",s);
第6题
A.It's cheap.
B.It's fast.
C.It's comfortable.
D.Both B and C.
第7题
A.It's Brazil.
B.It's Argentina.
C.It's Chile:
D.It's Equator.
第8题
A.He's reading a book.
B.He's a company manager.
C.He's very well.
D.He's about 30.
第9题
如图所示,S△ABC=1,若S△BDE=S△DEC=S△ACE,则S△ADE=()。