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【单选题】
下列说法正确的是A.
活化分子之间的碰撞一定是有效碰撞
B.
升高温度时，活化分子百分数增加
C.
反应物分子的每次碰撞发生化学反应
D.
有气体参加的化学反应，若增大压强(即缩小反应容器的体积)，可增加活化分子的百分数，从而使反应速率增大
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【简答题】生词：sitting-room: 客厅 wall: 墙 1. What's your favorite? A. Watching TV. B. Sitting room. C. Pictures on the wall 2. There are ______ in the house. A. three rooms B. many people C. some pictures and a com...
【单选题】Sir, you _______ be sitting in this sitting room. It is for women and children only.
A.
oughtn’t to
B.
can’t
C.
won’t
D.
needn’t
【单选题】The artist was welcomed into a room that seemed to serve as workshop, sitting－room and kitchen __
A.
34．The artist was welcomed into a room that seemed to serve as workshop, sitting-room and kitchen ______． A．combined
B.
to combine
C.
combining
D.
being combined
【多选题】(Para. 20) Why is it improper to have dictionaries in a sitting room?
A.
Because a sitting room is a place for entertainment.
B.
Because it is a place for family members to relax.
C.
Because when people are chatting in a sitting room, the purpose is to share their feelings instead of persuading.
【单选题】There _____ a TV set and a number of chairs in the sitting room .
A.
are
B.
being
C.
were
D.
is
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