题目内容
(请给出正确答案)
[主观题]
There are_________ of visitors to Kunming.
A.tens of thousands 2000
B.about ten of thousands
C.about three thousands
D.about three thousand
答案
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A.tens of thousands 2000
B.about ten of thousands
C.about three thousands
D.about three thousand
第4题
A.C(1/5 K₂Cr₂O₇)=2.5C(K₂Cr₂O₇).
B.5C(1/5 K₂Cr₂O₇)=C(K₂Cr₂O₇)
C.C(1/5 K₂Cr₂O₇)=C(K₂Cr₂O₇)
D.C(1/5 K₂Cr₂O₇)=5C(K₂Cr₂O₇)
第8题
A.正确
B.错误
第10题
A、C、P、O、N
B、Al、H、O、Mg
C、C、H、O、N
D、C、H、O、S