书架上有4本不同的书,甲、乙、丙三人去选书,每人至少选一本,则共有 _____种

题型:填空题

问题:

书架上有4本不同的书,甲、乙、丙三人去选书,每人至少选一本,则共有 _____种不同选法.

考点:排列与组合二项式定理与性质
题型:填空题

第二节: 信息匹配(共5小题;每小题1分,满分5分)

请阅读下列应用文及相关信息,并按照要求匹配信息。请将答案填写在答题卡标号为76-80的相应位置上.注意:E="AB;" F=CD

Molly 信箱是一个报刊栏目,主持人Molly 回答读者提出的各种问题. 第1至第5题是五位读者的来信.请从A、B、C、D、E、F中为每封来信选出合适的答复.

76. Dear Molly,

I have a problem. My parents are always talking to me about studying. They want me to study harder so I can go to a good school. I know studying is very important, but my parents put too much pressure on me. How can I explain to my parents that I need some free time?

------ Overworked

77. Dear Molly,

My best friend Tony is a nice young man, but he has a bad habit. He is always late. No matter where he is going or what he is doing, he is never on time. Once he turned up thirty minutes late for a meeting! What can I do to break him of this bad habit?

------ Worried

78. Dear Molly,

I have a new roommate named Louis. He is a good friend of mine, but he is driving me crazy because he is very untidy. He leaves his dirty clothes everywhere, and he never makes his bed. I am extremely neat. What can I do?

---- Unhappy

79. Dear Molly,

My cousin plays computer games a lot and he keeps on talking to me about various games. I don’t have any interest at all, but I find it difficult to stop him without hurting his feelings. Would you kindly give me some advice?

----- Shy

80. Dear Molly,

I’m feeling upset these days because the result of my last English exam was not as good as I had expected. My teacher comforted me, saying “Don’t worry. You can do better next time.” But I’m still feeling bad. I need your help.  

----Disappointed

A: Dear xx,

As I see it, you have three choices. You can find a new flat for yourself, make him find a new one, or have a talk with him and see if you could both be a little less extreme in your attitudes towards housekeeping. I would suggest you start with the third.

Molly

B: Dear xx,

You could try talking to him about the importance of being on time. If it doesn’t work, one trick you can try is to ask him to set his clock 15 minutes ahead. You could also tell him that something starts 15 minutes or more before it really starts.

Molly

C: Dear xx,

This is a common problem for people of your age. Tell your parents how you feel. Let them know you respect them. Maybe you can make a deal with them. For example, ask them for one day off each week to do what you want to do.

Molly

D: Dear xx,

Next time when he begins talking, you might interrupt him with a smile, saying

“That’s interesting, but I hope you understand this is my time to relax. I need to do some reading now.” He may sense your unwillingness and stop talking.

Molly

E: Dear xx,

“Be yourself ” is the best solution. If I were you, I’d tell him to leave me alone. At least tell him, “That was hurtful. Please don’t say things like that to me. I’m a football fan and like watching football games. I can make my own decision.”

Molly

F: Dear xx,

Scores are important for students, but you don’t have to care too much about the result of one test. You are learning. Maybe it is more important to find out why you failed to achieve your goal. Try to do better next time.

Molly

题型:填空题

若实数a,b,c满足a>b>c,且a+b+c=0,则有()。

A.ab>ac

B.ac>bc

C.a|b|>c|b|

D.a2>b2>c2

E.A、B、C、D都不正确

题型:填空题

下述哪项不符合肺嗜酸性粒细胞性肺炎的临床表现()

A.存在抗IgA抗体

B.血清IgE水平降低

C.外周血嗜酸性粒细胞明显增多

D.抗特异IgG抗体增高

E.速发型皮肤反应阳性

题型:填空题

国有小型企业的资产出售给内部职工,由职工入股,实行劳动者的劳动联合和劳动者的资本联合的股份合作制,这时______。

A.企业的公有制就转为非公有制

B.公有资产在社会总资产中的比重增大

C.国有资产的价值量减少

D.公有制实现形式发生变化

题型:填空题

根据当地的实际情况,说明如何种植绿肥和合理利用绿肥?

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