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【单选题】
流量调节,离心泵常用( ),往复泵常用( )。A.
出口阀 旁路阀
B.
进口阀 出口阀
C.
旁路阀 出口阀
D.
进口阀 旁路阀
拍照语音搜题，微信中搜索"皮皮学"使用
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举一反三
【判断题】If two phonetically similar sounds occur in the same environments and they distinguish meaning, they are said to be in complementary distribution.
A.
正确
B.
错误
【判断题】If you need your recipient to do something, you’d better not outline it in your email.
A.
正确
B.
错误
【单选题】If two phonetically similar sounds are two distinctive phonemes, they are said to form a .
A.
minimal pair
B.
complementary distribution
C.
phonemic constrast
D.
minimal set
【简答题】置位指令 中, N 的取值范围为:( )
【单选题】If you_______ the receipt, you could have got a refund for those jeans.
A.
didn't throw away
B.
hadn't threw away
C.
hadn't been throwing away
D.
hadn't thrown away
【判断题】If two phonetically similar sounds occur in the same environments and they distinguish meaning, they are said to be in complementary distribution.
A.
正确
B.
错误
【判断题】If you are in America, to improve your listening and speaking, you hang out with Americans.
A.
正确
B.
错误
【单选题】键盘Caps Lock指示灯不亮时，如果需要输入大写英文字母，下列______操作是可行的? A 按下［Shift］键的同时，敲击字母键 B 按下［Ctrl］键的同时，敲击字母键 C 按下［Alt］键的同时，敲击字母键 D 直接敲击字母键
A.
按下［ Shift ］键的同时，敲击字母键
B.
按下［ Ctrl ］键的同时，敲击字母键
C.
按下［ Alt ］键的同时，敲击字母键
D.
直接敲击字母键
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