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【单选题】
反应 2MnO 4 - (aq)+5S 2- (aq)+16H + = 2Mn 2+ (aq) +5S(s) +8H 2 O(l),在标准状态下电池电动势为2.00V,当某浓度是电池电动势为2.73,该反应的△ r G m 为A.
5*2.00F
B.
-5*2.00F
C.
10*2.73F
D.
-10*2.73F
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【多选题】下级机关向上级机关提出请示时必须做到
A.
凡属职权范围内的一般问题不随意请示
B.
请示必须一文一事 , 且主送机关只能有一个
C.
请示必须在事前
D.
上级机关收到请求后应认真研究 , 及时予以批复
【简答题】One day, when I was in ________ grade, my ________ class was preparing for a big exam. At one point I got up to wash my hands, but there weren't any paper towels. So I went to get some and, in the ___...
【单选题】The bakery is open every day ______ Wednesday.
A.
except
B.
besides
C.
except for
D.
except that
【单选题】My teacher recommended that I_____as careful as possible when I took an exam.
A.
am
B.
were
C.
be
D.
will be
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