题目

下列说法不正确的是（） A . 能发生有效碰撞的分子属于活化分子 B . 活化分子的平均能量与所有分子的平均能量之差称为活化能 C . 升高温度，活化分子百分数增大 D . 活化分子的总数越多，反应速率越快 答案：D单句改错。(     )1. I am (A) enjoying (B) to sing (C) English songs (D). (     )2. I used (A) to playing (B) with my friends, but now I hardly (C) have time to do it (D).(     )3. We had (A) a (B) great fun (C) reading (D) English magazines.(     )4. A bike runs (A) many (B) more slowly (C) than (D) a train.(     )5. Martin didn't (A) know how (B) regard (C) the problem as (D) a challenge.1.______ 2.______ 3.______ 4.______ 5.______ 6.______