如图所示，一个箱子放在水平地面上，箱内有一固定的竖直杆，在杆上套着一个环，箱和杆

发布时间：2017-07-20 08:03 │ 来源：www.tikuol.com

题型：选择题

问题：

如图所示，一个箱子放在水平地面上，箱内有一固定的竖直杆，在杆上套着一个环，箱和杆的质量为M，环的质量为m,已知沿着杆以加速度a加速下滑(a＜g),则此时箱对地面的压力N的大小是（）

A．Mg

B．(M+m)g

C．(Mg+mg)－ma

D．(M－m)g＋ma

考点：牛顿第二定律

题型：选择题

完形填空。

    Bill Gates   1   on October 28th, 1955. He   2   in Seattle, Washington. His favorite subjects at school
were science and math.   3   he was 13 years old, Bill started to play with computers. Computers at that
time   4   very large, but he was interested   5   them. He   6   lots of time doing unusual things with computers.
In the end, he and some of his friends worked out a software program (软件程序) with an old computer.
He   7   it for ＄4,200 dollars. In 1973, Bill   8   Harvard University (哈佛大学). He left there in the third
year to work for a company called Microsoft. In 1975 Bill began his company   9   his friend Paul Allen.
They developed software for personal computers. They improved (改进) the software to make it  10  for
people to use computers.

( )1. A. is born
( )2. A. grow
(    )3. A. At
(    )4. A. is
(    )5. A. at
( )6. A. took
( )7. A. sell
( )8. A. went
( )9. A. and
(    )10. A. easy

B. was born
B. grew
B. Until
B. are
B. in
B. put
B. sale
B. went to
B. with
B. easier

C. did born
C. grew up
C. When
C. was
C. on
C. paid
C. sold
C. want
C. for
C. difficult

D. born
D. has grew up
D. At the moment
D. were
D. for
D. spent
D. bought
D. wanted
D. by
D. more difficult

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对于农户信用等级为较好档次的保证贷款，如果其贷款本金或利息逾期91天—180天，按照自然人一般农户贷款的分类标准应归为（）。

A、正常

B、关注

C、次级

D、可疑

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围绕以下《外交大事记》的一块展板，四位同学展开讨论，其中观点正确的是

甲：中国发展结伴而不结盟的新型国家关系

乙：中国积极参与地区性国际组织的活动

丙：中国对世界和平与发展作出了重大贡献

丁：为中国经济建设创造和平的国际环境[ ]

A．甲、丙、丁

B．乙、丙

C．甲、乙、丁

D．丙、丁

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下列关于股票的说法，正确的有()。

A．股票能够给持有者带来收益

B．股票表明投资者的投资份额及其权利和义务

C．股票是股份公司发行的有价证券

D．股票是一种债权凭证

E．股票的实质是公司的产权证明书

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题型：选择题

在服装制作过程中，主要部位规格分档：肩宽为（）cm。

A、1.2

B、1.5

C、2.0

D、4.0

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