丙氨酸转氨酶（ALT）是评估肝功能的主要指标，下述正确的是（） A.酶水平的高低和肝

下列现代生物科技成果属于无性繁殖的是（　　）

①通过组织培养繁殖花卉；②克隆羊“多莉”的产生；③三倍体无籽西瓜的培育；④通过嫁接繁殖优质苹果；⑤培育“试管婴儿”．

A．①②⑤

B．①②③

C．①②④⑤

D．①②④

比一比，组成词语。

红（　　）但（　　）于（　　）情（　　）

给（　　）担（　　）干（　　）请（　　）

犯罪主体可以是司法工作人员以外的人的犯罪的是()

A．私放在押人员罪

B．虐待被监管人罪

C．报复陷害罪

D．刑讯逼供罪

You wake up in the morning，the day is beautiful and the plans for the day are what you have been looking forward to for a long time. Then the telephone rings，you say hello, and the drama starts．The person on the other end has a depressing tone in his voice as he starts to tell you how terrible his morning is and that there is nothing to look forward to．You are still in a wonderful mood? Impossible!

Communicating with negative people can wash out your happiness．It may not change what you think，but communicating long enough with them will make you feel depressed for a moment or a long time．

Life brings ups and downs，but some people are stuck in the wrong idea that life has no happiness to offer．They only feel glad when they make others feel bad．No wonder they can hardly win others’ pity or respect．

When you communicate with positive people，your spirit stays happy and therefore more positive things are attracted．When the dagger(匕首) of a negative person is put in you，you feel the heavy feeling that all in all，brings you down．

Sometimes we have no choice but to communicate with negative people．This could be a co-worker，or a relative．In this case，say what needs to be said as little as possible. Sometimes it feels good to let out your anger back to the negative person，but all this does is to lower you to that same negative level and they won’t feel ashamed of themselves about that．

Negativity often affects happiness without even being realized．The negative words of another at the start of the day can cling to(附着) you throughout the rest of your day，which makes you feel bad and steals your happiness．Life is too short to feel negative．Stay positive and avoid negativity as much as possible．

小题1: The purpose of the first paragraph is to ______.

A．make a comparison

B．offer an evidence

C．introduce a topic

D．describe a daily scene小题2: How can negative people have effect on us?

A．By influencing our emotion．

B．By telling us the nature of life．

C．By changing our ways of thinking．

D．By comparing their attitudes to life with ours．小题3: Some negative people base their happiness on _______.

A．other people’s pity for them

B．making other people unhappy

C．building up a positive attitude

D．other people’s respect for them小题4: According to the passage, to reduce negative people’s influence on us，we are advised to ____.

A．change negative people’s attitudes to life

B．show our dissatisfaction to negative people

C．make negative people feel ashamed of themselves

D．communicate with negative people as little as possible小题5:What is the author’s attitude towards negative people?

A．Favorable．

B．Critical.

C．Indifferent.

D．Supportiv

硬盘的速度主要取决于下面哪个性能指标？（）

A.平均寻道时间

B.转速

C.数据传输率

D.缓存容量