紫外线杀菌灯
参考答案:
直接利用紫外线(中心波长为253.7nm)达到消毒目的的特种电光源
He likes to play games, ___________ she likes to play with the doll.[ ]
A. and
B. but
C. to
赤道没有穿过的大洲是( )
A.非洲
B.亚洲
C.大洋洲
D.欧洲