问题
单项选择题
预防接种是()
A.控制传染源
B.切断传播途径
C.保护易感人群
D.包括ABC
答案
参考答案:C
预防接种是()
A.控制传染源
B.切断传播途径
C.保护易感人群
D.包括ABC
参考答案:C
阅读短文,从方框中选出适当的动词,并用其适当形式填空。有的需要加助动词或不定式符号。 | |
many interesting stories in the paper. You just need to make clear what you are looking at."I spend about half an hour 2______ newspapers every day," said 15-year-old Gao Ming from Beijing."I'm 3______ in things happening at school." School news is just one kind of news story in newspapers. There's also world news: from international problems to pop stars. Read the newspaper 4______, we'll find much information. But we'd better not 5______ the advertisement. |