这道题怎么算

自然通风气流下降式烤房通风排湿即打开()。

A.进风洞

B.排湿管

C.天窗

D.风机

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

Its very likely that you will make mistakes in foreign countries______.

A．by following the conventions in your society

B．by imitating all their behaviors

C．with too much knowledge on conventions

D．without knowing their behaviors

请帮忙给出正确答案和分析，谢谢！

What is the mans request？

A．To have breakfast in the room.

B．To pay the bill when checking out.

C．To sign the name in the morning.

D．To use a new credit card for the room.

请帮忙给出正确答案和分析，谢谢！

What does the man say about watching classic movies？

A．It is helpful in practicing one"s pronunciation.

B．It can make people relaxed.

C．It can enrich their college life.

D．It is the source of classic music.

请帮忙给出正确答案和分析，谢谢！

Whether English should be a tool or a subject has generated a heated discussion over the past decade. Some argue that English as a subject has taken up too much time of Chinese students, so that it should be removed from the school syllabus. While others argue that English as a tool should be learned. Whats your opinion？ Write on ANSWER SHEET THREE a composition of about 200 words on the following topic-. Is English a Tool or a Subject？ You are to write in three parts. In the first part, state specifically what your opinion is. In the second part, support your opinion with appropriate reasons. In the last part, bring what you have written to a natural conclusion or make a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the instructions may result in a loss of marks.

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分泌褪黑素的是

A.下丘脑

B.腺垂体

C.甲状腺

D.肾上腺

E.松果腺

请帮忙给出正确答案和分析，谢谢！