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【判断题】
因阻塞、等需要改变行车路线时，需向乘客说明原因，征求乘客意见。A.
正确
B.
错误
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
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【简答题】利用上题中的三张表,检索选修课程“C2”的学生中成绩最高的学生的学号。正确的SELECT语句是(10.0分)A. SELECT S# FORM SC WHERE C#=“C2” AND GRAD>= (SELECT GRADE FORM SC WHERE C#=“C2”) B. SELECT S# FORM SC WHERE C#=“C2” AND ...
【单选题】标准氢电极是:
A.
Pt ， H 2 ( p Ө )│OH - ( a OH - =1)
B.
Pt ， H 2 ( p Ө )│OH ( a OH - =10 -7 )
C.
Pt ， H 2 ( p Ө )│H + ( a H + =10 -7 )
D.
Pt ， H 2 ( p Ө )│H + ( a H + = 1)
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