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【单选题】
19 独立电源置零,即将电压源________,电流源________。A.
A．短路 短路
B.
开路 开路
C.
短路 开路
D.
开路 短路
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【单选题】-What do you think about That food ? -__________
A.
I didn't have a lot of time to prepare food, so much of my experience comes from eating in restaurants.
B.
A big change was using public transportation in Tokyo.
C.
Overall, the diet there is a healthy one-low fat.
【单选题】听力原文：M: Hi, Helen, what do you think of our class in children's literature? W: It's pretty good. I was surprised to see you there. Are you also majoring in elementary education? M: No, I'm not, but as...
A.
Art history.
B.
Elementary education.
C.
American literature.
D.
Psychology.
【简答题】在以下括号中填上“顺式”或者“反式” 1、烯烃与卤素的加成反应是( )加成; 2、烯烃与氢气的加成反应是( )加成; 3、烯烃发生的硼氢化-氧化反应是( )加成。
【简答题】在烯烃与卤化氢的加成反应中， 卤化氢反应最快（HCl，HBr，HI）
【单选题】甲、乙两个车间人数的比是7：6，现在从甲车间调18人到乙车间，这时甲、乙两个车间人数的比变为2：3，原来甲、乙两车间分别有_______人．（ ）
A.
52、78
B.
70、60
C.
77、66
D.
63、54
【单选题】W hich one dose Not carry the same meaning with “ yearn to do ”?
A.
long to do
B.
be destined to do
C.
eager to do
D.
dream of doing
【单选题】在烯烃与卤化氢的加成反应中，卤化氢的反应活性顺序为（）。
A.
HI＞HBr＞HCl
B.
HBr＞HCl＞HI
C.
HCl＞HI＞HBr＞HF
D.
HCl＞HI＞HB
【单选题】听力原文：Which do you prefer, a pen or a pencil? (A) My pencil needs sharpening. (B) I prefer to write with a pen. (C) This pen writes well. (33)
A.
B.
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