. you like it or not, you'll have to give up smoking.
A.If
B.Whether
C.How
D.Why
答案:B
细菌和真菌的生存也需一定的条件,如______、适宜的温度、______.
穿越我国领土距离最长的纬线是( )
A.北纬30度
B.北纬45度
C.北纬60度
D.北纬40度