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【单选题】
15K时,某电池反应为Zn(s)+Mg2+(a=0.1) Zn2+(a=1)+Mg(s),实验测得该电动势E=-0.2312V,则电池的标准电动势为( )A.
0.2093V
B.
-0.2312V
C.
0.0231V
D.
-0.202V
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举一反三
【单选题】Not until they left school _____ how much their teachers loved them and helped them. [ ]
A.
they realized
B.
did they realize
C.
they would realize
D.
had they realized
【单选题】Not until they left school how much their teachers loved them and helped them.
A.
they realized
B.
did they realize
C.
had they realized
D.
they would realize
【单选题】某企业借得1000万元的贷款,在10年内以年利率12%等额偿还,则每年应付的金额为( )
A.
1000/(P/A，12%，10)
B.
1000×(P/A，12%，10)
C.
1000×(A/F，12%，10)
D.
1000×(P/F，12%，10)
【简答题】按冒口在铸件位置上分类，主要分为（）冒口与（）冒口之分。
【单选题】Not until they left school ____how much their teachers loved them and helped them.
A.
that they realized
B.
had they realized
C.
when they would realize
D.
did they realize
【单选题】Not until they left school________how much their teachers loved them and helped them.
A.
they realized
B.
did they realized
C.
the would realized
D.
had they realized
【单选题】在反相色谱法中,若以甲醇一水为流动相,增加甲醇的比例时,组分的容量因子k与保留时间tR的变化为
A.
k与tR增大
B.
k与tR减小
C.
k与tR不变
D.
k增大，tR减小
【单选题】Not until they left school ______ how much their teachers loved them and helped them.
A.
they realized
B.
had they realized
C.
they would realize
D.
did they realize
【单选题】Not until they left school how much their teachers loved them and helped them.
A.
they realized
B.
did they realized
C.
they would realized
D.
had they realized
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