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【单选题】
下列化合物中哪一个酸性最强?A.
甲酸
B.
苯磺酸
C.
三氟甲磺酸
D.
三氟乙酸
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【简答题】已知集合P={ x|lgx＞0，x∈R }，Q={ x|2 x ＜4，x∈R }，则P∩Q=______．
【简答题】So, I happen to know a little bit from my own workabout how NASA has been using hydroponicsto explore growing food in space.And you can actually get optimal 9) ________yieldby running a kind of high-q...
【单选题】When you are through _____ the materials, would you please write a report in 5000 words?
A.
By
B.
with
C.
on
D.
beyond
【单选题】设随机变量X的数学期望为EX = m，方差为DX = s 2，则由切比雪夫不等式，有P{| X - m | ³ 3s} £（ ）．
A.
1/9
B.
8/9
C.
1
D.
无法确定
【简答题】Stylistics is a discipline that studies the ways in which language is used; it is a discipline that studies the styles of language in use. It is about how you can use knowledge about _________________...
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