非英语专业的考什么英语证书好呢？除了英语专业的...

What does the author mean by the word "progress" in this passage?

A．Urbanization.

B．Economic growth.

C．Cultural development.

D．Increase of population.

How many generators does the shuttle carry?

A．One.

B．Two.

C．Three.

D．Four.

What can be concluded about "modem" ?

A．It converts data from one form. to another.

B．It will be out of date soon.

C．It serves as a link between senders and recipients of message.

D．It transmits message more efficiently than other devices.

Why are the lions in the Git Forest especially vulnerable to disease?

A．They are physically weaker than the African lions.

B．They are small in size.

C．They do not have enough to eat.

D．They have descended from a dozen or so ancestors.