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【判断题】
投影面垂直面的投影特性是:与哪个投影面垂直,在该投影面上的投影积聚成一条直线,但是并不表示与另两个投影面的真实倾角。A.
正确
B.
错误
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举一反三
【单选题】After ______ seemed to be hours of waiting in line, I finally got my turn to take the oral exam. [ ]
A.
that
B.
it
C.
what
D.
which
【单选题】听力原文：M: Last time, we outlined how the Civil War finally got started. I want to talk today about the political management of the war on both sides: the north under Abraham Lincoln and the south under ...
A.
Advantages of the north in the Civil War.
B.
Civilian opposition to the Civil War.
C.
Reasons to justify fighting the Civil War.
D.
Military strategy used in the Civil War.
【单选题】酶的辅酶是
A.
与酶蛋白结合紧密的金属离子
B.
在催化反应中不与酶的活性中心结合
C.
与酶蛋白共价结合成多酶体系
D.
分子结构中不含维生素的小分子有机化合物
E.
在反应中作为底物传递质子、电子或其他基团
【单选题】I finally got the job I dreamed about. Never in my life ______ so happy.
A.
did I feel
B.
I felt
C.
had I felt
D.
I had left
【简答题】用司盘-80、吐温-80配成混合乳化剂5克,使其HLB值为13.2,计算各个乳化剂的用量
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