操作系统（Operation System,简称OS)是管理计算机硬件与软件资源的计算机程序。（)

Why sharks are useful for humans？

A．Their tasty meat.

B．The principle of their defense system against disease.

C．Their solid skin.

D．The principle of their birth modes.

According to the passage, what could be an efficient way to use water？

A．Adopting the system of water right owned by the government.

B．Charging for water in places where water is becoming scarcer.

C．Taking political measures to interfere with the water issue.

D．Making it a free market for people to trade water-usage rights.

What is the main topic of the passage？

A．While there are many problems with the court system, there are available suggestions for improvement.

B．The legislature needs to formulate fewer laws so that judiciary can catch up on its older cases.

C．Nobody seems to care enough to attempt to find methods for making the judicial system more efficient.

D．All states should follow California's example in using small-claims courts in order to free judges for other work.

原型操作(prototype operation)

A．your operation

B．is your operation

C．your operation is

D．will your operation

When was the operation finished？ The operation was finished at ______.

A．around 8: 30

B．about 7: 00

C．around 4: 00

A.operation

B.flight

C.movement

D.transportation

[A] research

[B] operation

[C] movement

[D] search

The doctors performed a heart operation that was a miracle of medical skill.

A．climax

B．prodigy

C．mirage

D．acme

The eye operation was such a failure that the woman refused to pay for it,

A．Right

B．Wrong

C．Not mentioned