皮皮学，免费搜题
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搜题
【单选题】
与带传动相比,链传动的优点是
A.
工作平稳，无噪声
B.
传动功率小
C.
制造费用低
D.
能保持准确的平均传动比
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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举一反三
【单选题】—Where is Joy? —He _____ to the library [     ]
A.
 went
B.
has gone
C.
has been
查看完整题目与答案
【判断题】检索词只能是词语，分类号、作者姓名、机构名称、分子式、专利号、ISBN号与ISSN号等不能用作检索词。
A.
正确
B.
错误
查看完整题目与答案
【判断题】静态零点的电压一定是0V,因为它叫做“零点”。
A.
正确
B.
错误
查看完整题目与答案
【判断题】检索词只能是词语,分类号、作者姓名、机构名称、分子式、专利号、ISBN号与ISSN号等不能用作检索词
A.
正确
B.
错误
查看完整题目与答案
【判断题】在输入电压为零时,甲乙类推挽功放电路中的电源所消耗的功率是两个管子的静态电流与电源电压的乘积。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】----Is Mary at home? ----No, she_________ the library. She _________ there a moment ago.
A.
has gone to, went
B.
has gone to, has been
C.
has been to, went
D.
has been to, has gone
查看完整题目与答案
【单选题】Amy ____ the school library. She ______ books three times a week.
A.
has gone to; has used to borrow
B.
has been to; used to borrow
C.
has gone to; has been used to borrowing
D.
has been to; is used to borrowing
查看完整题目与答案
【单选题】—Is your brother at home? —No. He _______ the library. [     ]
A.
was going to
B.
has been to
C.
has gone to
D.
went to
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【单选题】具有三组解理的矿物是( )。
A.
方解石
B.
正长石
C.
云母
D.
石英
查看完整题目与答案
【判断题】在输入电压为零时,甲乙类推挽功放电路中的电源所消耗的功率是两个管子的静态电流与电源电压的乘积。 ( )
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】—Where is Joy? —He _____ to the library [     ]
A.
 went
B.
has gone
C.
has been
查看完整题目与答案
【判断题】检索词只能是词语，分类号、作者姓名、机构名称、分子式、专利号、ISBN号与ISSN号等不能用作检索词。
A.
正确
B.
错误
查看完整题目与答案
【判断题】静态零点的电压一定是0V,因为它叫做“零点”。
A.
正确
B.
错误
查看完整题目与答案
【判断题】检索词只能是词语,分类号、作者姓名、机构名称、分子式、专利号、ISBN号与ISSN号等不能用作检索词
A.
正确
B.
错误
查看完整题目与答案
【判断题】在输入电压为零时,甲乙类推挽功放电路中的电源所消耗的功率是两个管子的静态电流与电源电压的乘积。( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】----Is Mary at home? ----No, she_________ the library. She _________ there a moment ago.
A.
has gone to, went
B.
has gone to, has been
C.
has been to, went
D.
has been to, has gone
查看完整题目与答案
【单选题】Amy ____ the school library. She ______ books three times a week.
A.
has gone to; has used to borrow
B.
has been to; used to borrow
C.
has gone to; has been used to borrowing
D.
has been to; is used to borrowing
查看完整题目与答案
【单选题】—Is your brother at home? —No. He _______ the library. [     ]
A.
was going to
B.
has been to
C.
has gone to
D.
went to
查看完整题目与答案
【单选题】具有三组解理的矿物是( )。
A.
方解石
B.
正长石
C.
云母
D.
石英
查看完整题目与答案
【判断题】在输入电压为零时,甲乙类推挽功放电路中的电源所消耗的功率是两个管子的静态电流与电源电压的乘积。 ( )
A.
正确
B.
错误
查看完整题目与答案