假设某个国家的总人口数为3000万人,就业者为1500万人,失业者为500万人,则该国的失业率为:()
A.17%
B.34%
C.25%
D.30%
参考答案:C
阅读短文,判断句子正(T)误(F)。
Mr. Green is an Englishman. He is a teacher. He teaches English in No. 15 Middle School in Beijing. He likes
teaching a lot. He goes to work by school bus every morning.
There are fifty students in his class. He speaks English with them in class. He plays games with them after
class. He likes them very much. And his students love him, too. They are good friends.
( ) 1. Mr. Green is Canadian.
( ) 2. He likes teaching very much.
( ) 3. He goes to work by bike every morning.
( ) 4. He speaks Chinese in class.
( ) 5. He likes his students very much.
疱疹性口炎多见于()
A.婴幼儿或儿童
B.婴幼儿或老年人
C.成人
D.儿童或成人
E.成人或老年人