臭氧层位于大气圈的()
A.对流层
B.平流层
C.中间层
D.暖层
参考答案:B
“69”顺倒过来看还是“69”,我们把这两个顺倒一样的数,称为一对数.你能在“0,1,6,9,8”这五个数中任意选出3个,可以组成几对顺倒相同的数?
He escaped _____ this time, but his troubles were by no means over.[ ]
A. largely
B. narrowly
C. badly
D. simply