填料吸收塔塔底为什么要有密封装置?
参考答案:
液封的目的是保证塔内的操作压强。
It is reported that some mainland visitors to Hong Kong Disneyland didn't _______ the park rules and behaved improperly.
A.get across
B.keep to
C.take up
D.make up
(A) 条件(1)充分,但条件(2)不充分(B) 条件(2)充分,但条件(1)不充分(C) 条件(1)和(2)单独都不充分,但条件(1)和(2)联合起来充分(D) 条件(1)充分,条件(2)也充分(E) 条件(1)和(2)单独都不充分,条件(1)和(2)联合起来也不充分以后不再重复说明。