简述催化裂化汽油的特点有哪些？
参考答案：
1.辛烷值高；2.安定性比较好；3.馏分组成较轻。
She _____ clean out the spare room last week, but it was too much occupied at that time. [ ]
A. intended to
B. was intended to
C. had intended to
D. has intended to
筛选客户的依据有（）
A、客户全年购买额
B、收益性
C、安全性
D、未来性
E、合作性
