近一阶段，小华的爷爷吃饭时不能准确地把饭送到嘴里，请你告诉他原因[ ] A．可能

与命题“若p则￢q”等价的命题为（　　）

A．若p则q

B．若￢p则q

C．若q则￢p

D．若￢q则p

矿山安全技术

矿井高压电网，必须限制单相接地电容电流，使之不超过( )。

A．10A

B．20A

C．30A

D．40A

三、完形填空（共20小题；每小题1分，满分20分）

请认真阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

Making friends is a skill. Like most skills, it improves with practice. If you want to meet people and make friends,    31   must be willing to take actions. You must first go to the place_  32   are people. You won’t make friends    33  home alone.   34   a club or group, for talking with those who like the same things as you do is    35    . Or join someone in some activity. Many people are nervous when talking to people. After all, meeting strangers means facing    36   . And it’s human    37   to feel a bit uncomfortable about the unknown.

Most of our fears about dealing with new people    38    doubts about ourselves. We imagine other people are judging us,    39    us too tall or too short, too this or too that.   40   don’t forget that they must be feeling    41     way as you. Try to accept yourself    42    you are, and try to put the other person at ease. You will ____43___ feel more comfortable.

Try to act self-confident even if you don’t feel that way.   44   you enter a room full of strangers, such as a new classroom, walk tall and straight, look ___45___ at other people and smile. If you see someone you’d like to   46   to, say something. Don’t wait for the other person to  47   a conversation.

Just meeting someone    48   doesn’t mean that you will make friends with that person. Friendship is  49   on mutual (相互的) liking and “give and take”. They take time and   50    to develop. And there are things that keep a new friendship from growing.

31.  A. you                        B. they                         C. it                             D. I

32.  A. when               B. whether                       C. where                  D. however

33.  A. arriving              B. returning               C. staying                 D. leaving

34.  A. Recognize            B. Accept                 C. Share                         D. Join

35.  A. more difficult       B. easier                   C. uncomfortable           D. ordinary

36.  A. a friend               B. the enemies                 C. trouble                        D. the unknown

37.  A. nature                       B. fault                    C. weakness             D. manners

38.  A. come from                B. give up                C. get over               D. carry off

39.  A. finding               B. making                C. stopping               D. treating

40.  A. And                    B. Therefore             C. But                    D. So

41.  A. in the                  B. a friendly              C. different               D. the same

42.  A. what                   B. as                       C. how                    D. where

43.  A. neither                B. both                     C. hardly                  D. never

44.  A. When                 B. As if                    C. So that                        D. In which

45.  A. specially             B. directly                C. shyly                   D. strictly

46.  A. refer                 B. write                    C. speak                         D. pay

47.  A. start                  B. stop                    C. develop                 D. hold

48.  A. strange                B. new                     C. famous                 D. active

49.  A. depended             B. lied                      C. taken                   D. based

50.  A. money                 B. resource                C. effort                   D. trouble

一级资质建筑专业承包企业的安全管理机构的专职安全管理人员不应少于（）。

A、2人

B、3人

C、4人

D、6人