以下所列单位中，经批准可以招用未满十六周岁的未成年人的有（）。

According to the passage, Frederick Ⅱ carried on the experiments to ______.

A．prove that children are born with the ability to speak

B．find out what role careful nursing would play in teaching a child to speak

C．discover what language a child would speak without hearing any human Speech

D．prove that child would be damaged without learning language

Chinese language will be an ________ of greater and greater value.

A．asset

B．ethic

C．inventory

D．obligation

The bitterness of the French people toward the English language shows ______.

A．what a political role languages can play in society

B．how people can attach political significance to which language they speak

C．languages in fact always fail to play a political role in society

D．some people like to give languages roles to play

The bitterness of the French people toward the English language shows

A．what a political role languages can play in society

B．how people can attach political significance to which language they speak

C．languages in fact always fail to play a political role in society

D．some people like to give languages roles to play

the irish people speak the same language as the english people do. ()

._______ evidence that languageacquiring ability must be stimulated.

A) If being B) It is C) There is D) There being

None of us could speak the language (speak) ______ in that area, so we took an interpreter with us.

A、Can you speak some foreign languages？

B、Can you speak any foreign language？

C、Can you speak any foreign languages？

D、Can you speak some foreign language？

n students begin their own projects, they are likely to find that the standards of validity in field work considerably more rigorous than the standards for most library research. When students are faced with the concrete problem of proof by field demonstration, they usually discover that many of the "important relationships" they may have criticized other researchers for failing to demonstrate are very elusive indeed. They will find, if they submit an outline or questionnaire to their classmates for criticism, that other students make comments similar to some they themselves may have made in discussing previously published research. For example, student researchers are likely to begin with a general question but find themselves forced to narrow its focus. They may learn that questions whose meanings seem perfectly obvious to them are not clearly understood by others, or that questions which seemed entirely objective to them appear to be highly biased to someone else. They usually find that those who have not actually attempted it generally believe the formulation of good research questions is a much more subtle and frustrating task.

What does the author think about trying to find weaknesses in other people's research?

A．It should only be attempted by experienced researchers.

B．It may cause researchers to avoid publishing good work.

C．It is currently being done to excess.

D．It can be useful in planning future research.