一般通过湿沉降过程去除大气中颗粒物的量约占总量的(),而干沉降只有10%~20。
参考答案:80%~90%
下列那些中成药剂型在贮存中易被虫蛀
A.片剂
B.酒剂
C.软膏剂
D.散剂
E.以上均不是
The man _____ the old man over a small thing left me _____ outside the room.[ ]
A. argued with; waiting
B. argued about; waited
C. arguing with; waiting
D. arguing about; waited