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【单选题】
下列说法正确的是（ ）A.
对于有气体参加的化学反应来说，增大压强，可使活化分子百分数增多，化学反应速率一定增大
B.
升高温度，活化分子百分数不变，但是碰撞的频率增大，所以化学反应速率增大
C.
增大反应物浓度，可增大单位体积内活化分子的百分数，从而使有效碰撞次数增大
D.
加入正催化剂，可以降低该反应的活化能，会使反应物活化分子百分数增加，所以化学反应速率加快
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【单选题】—Does your sister often talk to your parents? —Yes, . [ ]
A.
she does
B.
she don't do
C.
she isn't do
【单选题】—Can I have ________ apple? —Oh, your sister has just had it.
A.
another
B.
other
C.
one more
D.
the other
【单选题】My sister Sue ____________ a new coat, but I ____________. [ ]
A.
have, doesn't
B.
had, didn't
C.
didn't have, has
【单选题】-- Your father was angry ______ your sister just now, wasn't he?-- Yes, because he was not pleased ______ her homework.
A.
with with
B.
for to
C.
about for
【简答题】—________is your sister? —Sorry，l don-t know．
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