有三个关系R、S和T如下:其中关系T由关系R和s通过某种操作得到,该操作为()。 A

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问题:

有三个关系R、S和T如下:

其中关系T由关系R和s通过某种操作得到,该操作为()。

A.选择

B.投影

C.交

D.并

考点:计算机等级考试VISUALFOXPRO计算机二级考试VISUALFOXPRO模拟题二2014年
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根据《建筑安装工程费用项目组成》的规定,在下列费用中,属于规费的是()。

A.施工单位搭设的临时设施费

B.工程排污费

C.生产工人劳动保护费

D.已完工程和设备保护费

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计算:(2x-5y)2=______.

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When Frida Kahlo's paintings were on show in London, a poet described her paintings as “ a ribbon (丝带)around a bomb”. Such comments seem to suggest Kahlo had a big influence on the art world of her time. Sadly, she is actually a much bigger name today than she was during her time.

Born in 1907 in a village near Mexico City , Kahlo suffered from polio(小儿麻痹症)at the age of seven. Her spine (脊柱)become bent as she grew older. Then, in 1925, her back was broken in several places in a school-bus accident. Throughout the rest of her life, the artist had many operations, but nothing was able to cure the terrible pain in her back. However, the accident had an unexpected side effect. While lying in her bed recovering, Kahlo taught herself to paint.

In 1929, she got married to Diego Rivera, another famous Mexican artist. Rivera’s strong influences on Kahlo’s style can be seen in her early works, but her later works from the 1940s, known today as her best works, show less influence from her husband.

Unfortunately, her works did not attract much attention in the 1930s and1940s, even in her home country. Her first one-woman show in Mexico was not held until 1953.For more than a decade after her death in 1954, Kahlo’s works remained largely unnoticed by the world, but in the 1970s her works began to gain international fame at last.

小题1:What does the phrase “a much bigger name” in paragraph 1 most nearly mean?

A.a far better artist

B.a far more gifted artist

C.a much stronger person

D.a much more famous person小题2:The terrible pain Kahlo suffered was caused by         .

A.polio

B.back injuries

C.the operations she had

D.her bent spine小题3:Kahlo’s style had become increasingly independent since the           .

A.1950s

B. 1930s

C.1940s

D.1970s小题4:What is author’s attitude toward Kahlo?

A.Devotion

B.Sympathy

C.Worry

D.Encouragement

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以下哪些人员与多余物的防控有关()。

A.直接从事飞机生产的工人

B.工程技术人员

C.检验员

D.进入现场参观人员

E.零件、成品保管员

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QJJ不自闭会出现什么现象?如何处理?

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