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【简答题】
简述免疫球蛋白的生物学功能。
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
举一反三
【简答题】机油压力表是用来指示发动机油压力的大小,以便了解发动机 系工作是否正常。
【单选题】According to this conversation, what was the 'stupid mistake'?
A.
The student forgot to hand in his term paper because he was overtired and stressed.
B.
The student handed in the earlier draft paper instead of the final edited paper.
C.
The student missed the time to apply to grad school.
D.
The student found the mistake of the mark on his paper.
【简答题】—George is a stupid person. —But in my opinion, he is______than stupid. [A] wiser [B] more wise [C] more wiser [D] less wise