单选题：Efficient air service has been made available through modern

题目内容：

Efficient air service has been made available through modern technology. A．A　Affluent
B．B　Modern
C．C　Inexpensive
D．D　Effective

参考答案：

答案解析：

回答第56空。

回答第56空。A．A　suffer B．B　activate C．C　imitate D．D　play

分类：理工类题型：单选题

分类：理工类题型：单选题

How is the Internet or net explained in the passage? __________A．A　Electronic ro

分类：理工类题型：单选题

Which of the following statements about Humphrey is true?A．A　He is now still an

分类：理工类题型：单选题

In 186l it seemed inevitable that the Southern states would break away from the

分类：理工类题型：单选题