Did you catch the first bus to school this morning？
No I didn't． It had started moving ______ I could get on it．（ ）
| A． |
after |
B． |
since |
C． |
before |
D． |
as soon as |
Did you catch the first bus to school this morning？
No I didn't． It had started moving ______ I could get on it．（ ）
| A． |
after |
B． |
since |
C． |
before |
D． |
as soon as |
与
轴所围图形的面积为（）
，则
的值等于（）
，
，则使
成立的一个充分不必要条件是（）
，则
的大小关系是（）
，则
（）
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