非洲有世界上最大的沙漠_____ ___沙漠。非洲最高的山是__ ______。
撒哈拉 乞力马扎罗山
We can’t have lunch at the restaurant, because _________.
A.all of us don’t have money
B.not all of us have money
C.everyone of us doesn’t have money
D.none of us has money
对于生产加工车间进行空气消毒的方法是()
A.紫外线照射法
B.药物熏蒸法
C.正压过滤法
D.臭氧消毒法