小明同学平时不用功学习,某次数学测验做选择题时,他有1道题不会做,于是随意选了一

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问题:

小明同学平时不用功学习,某次数学测验做选择题时,他有1道题不会做,于是随意选了一个答案(每小题4个项), 他选对的概率是(      )。

考点:概率的意义
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________ copies of Mo Yan's works will be on sale after his talk at the Press Conference.

A.Signing

B.Sign

C.Signed

D.To sign

题型:填空题

With big handbags becoming a key fashion accessory(配饰) for working women, health experts are warning they can also become a key health concern.

Bags for women have become bigger and heavier as designers combine briefcases with handbags and straps have become longer, resulting in many users complaining of neck, shoulder and back problems.

“I see so many women with neck pains and headaches and what I usually do is look for their purse and pick it up,”said Jane Sadler, a family practice physician at Baylor Medical Center in Garland, Texas.“We take it over to the scale and weigh it and usually they’re anywhere from 7 to 10 pounds. We’re really going to see women with more and more problems later on if we continue the big purse craze.”

William Case, a physical therapist(临床医生)in private practice in Houston, Texas, urged designers“to place a cute, educational caution tag(标签) on all bags to inform buyers of potential neck and shoulder dangers.”Above all, he suggested correct posture while carrying big purses, keeping the head and shoulders upright. Patients should also often change the size and weight of purses carried.

“The extra-large purses are quite extraordinary. They look beautiful when the women wear them, but I don’t know how aware they are of the potential problems,”Case said.

Placing objects on one shoulder was one of the least efficient(高效率的) ways of carrying a load, according to a professor from Cornell University in New York State.“This causes a great imbalance,”he said.“If a big bag is a fashion accessory, then occasional and symbolic use is fine. If not, then keep it light.”

小题1:Jane Salder would“look for their purse and pick it up”in order to see whether the purses                        .

A.contained enough

B.were worth a lot of pounds

C.were too heavy

D.were too large小题2:Which correctly explains the meaning of the underlined word“posture”in the 4th paragraph?

A.The way you position your body.

B.The part of your body where you place a weight.

C.The strength you use to carry a weight.

D.The height of the weight you carry.小题3: None of the experts advised big bag users to             .

A.be aware of the big-bag problems

B.wear big bags in the right way

C.avoid using big bags very often

D.give up the fashion to keep fit

题型:填空题

林木生殖发育时期是如何划分的?各时期有什么特点?

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《中 * * 关于制定国民经济和社会发展第十一个五年规划的建议》提出,“十一五”期间我国经济与社会发展要坚持“六个必须”的原则,以下不属于“六个必须”原则内容的是( )。

A.必须保持经济平稳较快发展
B.必须加快转变经济增长方式
C.必须完善现代企业制度
D.必须提高自主创新能力

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开关量输出模块在继电器输出方式中,()作为开关器件,同时有是隔离器件

A、继电器

B、三极管

C、模拟开关

D、固态继电器

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