金属氧化物的烟气净化通常使用( )净化,并且该方法还可以用做气体净化的前处理及物料回收装置。
A.燃烧法 B.吸收法C.吸附法 D.袋滤法
参考答案:D
__________ English has changed a lot over time and __________ English spoken between about AD 450 and 1150 was quite different.
A./; the
B./; /
C.The; /
D.The; the
执行下列语句,其函数结果为( )。 STORE-100 TO X SIGN(X) * SQRT(ABS(X))
A.10
B.-10
C.l00
D.-100