皮皮学，免费搜题
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【单选题】
电路如图 所示,则Us 和Is 在电路中的作用分别是( )。A.
电源、电源
B.
负载、负载
C.
电源、 负载
D.
负载、 电源
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】7 Questions 5 to 8 are based on the conversation you have just heard.
A.
He was driven away by his wife.
B.
He did everything to protect him.
C.
He told a lie to his wife.
D.
He divorced his wife.
【简答题】A．肽键 B．氢键 C．二硫键 D．疏水作用 E．3′，5′-磷酸二酯键 蛋白质一级结构中的主要化学键
【单选题】Questions 5 to 8 are based on the conversation you have just heard.
A.
7. A) They are a healthy choice for elderly people.
B.
B) They are especially popular among Italians.
C.
C) They symbolize good health and longevity.
D.
D) They go well with different kinds of food.
【简答题】聚酰胺66粉末
【单选题】Questions 5 to 8 are based on the conversation you have just heard.
A.
Because he hates to ask the woman to lend him money.
B.
Because he needs money to pay the mortgage(按揭).
C.
Because he has used up all his savings for travel.
D.
Because such a travel is not worth it.
【单选题】Questions 5 to 8 are based on the conversation you have just heard.
A.
Because he is often busy writing books.
B.
Because he usually has meetings.
C.
Because he always gets up very late.
D.
Because he often goes out to exercise.
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