填空题

60（）

【参考答案】

B

<上一题目录下一题>

热门试题

单项选择题

If you need a transfusion, the best and safest blood for you is()

A．type AB
B．exactly the same type as yours
C．a mixture of salt, plasma and type O
D．type A

单项选择题

Which is the best title of this passage()

A．The Earliest People in North America.
B．The Earliest Immigrants to North America.
C．The People of the United States.
D．Europeans Were the Earliest People Coming to the North America.