输气管道堵塞的原因是由于天然气在运行中携带的()在低洼处形成堆积堵塞..
A.固体杂质和水
B.液体杂质和石块
C.气体杂质和液体杂质
D.固体和液体杂质
参考答案:D
.
She has_______ a lot of things, so she knows exactly how to deal with such a tough person.
A.gone by
B.got through
C.gone along with
D.gone through
看图猜成语。
( ) ( )