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【单选题】
设 b 是 a 的相反向量，则下列说法错误的是（ ）A.
a 与 b 的长度必相等
B.
a 与 b 的模一定相等
C.
a 与 b 一定不相等
D.
a 是 b 的相反向量
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【单选题】—I'm sorry to keep you waiting. —Oh, not al all. I ______here only a few minutes.
A.
have been
B.
had been
C.
was
D.
will be
【简答题】核偏位，胞浆有混浊泡沫感，可见核旁淡染区，核染色质呈车轮状
【单选题】I failed in the final examination last term and only then ____ the importance of studies.
A.
I realized
B.
I had realized
C.
had I realized
D.
did I realize
【简答题】写出单词的过去式以及过去分词have/has____、____
【单选题】听力原文：W: I heard on the radio that not only is it going to be super hot tomorrow but also the humidity is going way up. M: Sounds like I am going to have to find an air-conditioned place to be in. Q: W...
A.
He will search for an air-conditioner for his place.
B.
He will find a place to fix an air-conditioner.
C.
He will look for a place with air-conditioner to stay in.
D.
He will have a place for air-conditioner.
【单选题】It was not until I came here ________I realized this place was famous for not only its beauty but also its weather. (2012·湖南，30)
A.
who
B.
that
C.
where
D.
before
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