题目内容

She had no _________ but to ask for a few day’s leave.

A. alternative
B. choose
C. select

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Fortunately, the storm only did _______ damage to the farmer’s crops.

A. minimal
B. maximum
C. major

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举例说明体内负反馈和正反馈的调节过程及其生理意义。

试述人体功能调节中神经调节和体液调节是如何相辅相成的？