社会主义经济建设自改革开放以来所取得的令人瞩目的成就应该说与理论界和经济学家的突出贡

灯光：黑暗

A．财富：贫困

B．墨镜：光明

C．笤帚：卫生

D．小草：绿化

设命题p：方程x²+3x-1=0的两根符号不同；命题q：方程x²+3x-1=0的两根之和为3，判断命题“¬p”、“¬q”、“p∧q”、“p∨q”为假命题的个数为（　　）

A．0

B．1

C．2

D．3

用所给词的正确形式填空。

1、—Where's my seat, John? 

     —It's next to                (I).

2、It is nice for anybody to sit in an armchair in the garden                  (read) a book

3、It's               (polite) to speak with food in mouth.

4、—You look _________ (health) than before. What's wrong with you?

     —Maybe I have eaten                  (health) these days.

5、The girl is a                (live) child and everyone likes her a lot.

6、Tell me your                 (happy), please, and you'll feel better, I'm sure.

7、Hong Kong's return to China in 1997 marked that Britain's                 (control) over Hong Kong came to

     the end.

查封、续封的时间如何界定？

在间接制动时，分配阀是根据（）的压力变化来控制制动缸的压力变化。

A.列车管

B.均衡风缸管

C.单缓管