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问题 单项选择题

砖砌体工程中可设置脚手眼的墙体或部位是（）。

A.120mm厚墙

B.砌体门窗洞口两侧450mm处

C.独立柱

D.宽度为800mm的窗间墙

答案

参考答案：B

解析：此题有一定专业性，需考生具备一定工程实践经验，主要考核砌体结构中不能设置脚手眼的墙体或部位的知识点。根据相关规范，不得在下列墙体或部位设置脚手眼：（1）120mm厚墙、清水墙、料石墙、独立柱和附墙柱；（2）过粱上与过梁成60o角的三角形范围及过梁净跨度1/2的高度范围内；（3）宽度小于1m的窗间墙；（4）门窗洞口两侧石砌体300mm，其他砌体200mm范围内；转角处石砌体600mm，其他砌体450mm范围内；（5）梁或梁垫下及其左右500mm范围内；（6）设计不允许设置脚手眼的部位；（7）轻质墙体；（8）夹心复合墙外叶墙。故本题正确选项应为“B.砌体门窗洞口两侧450mm处"。

实验题

以下是某实验小组在探究金属化学性质过程中的部分实验记录，请你根据记录回答下列问题．

（1）根据金属活动性顺序，铝片应比锌片活泼．但记录显示实验开始阶段铝与稀盐酸的反应速率比锌 _________ （填快或慢），你认为该记录中铝片出现“开始无气泡，过一段时间后缓慢出现气泡”的特殊现象的原因是 _________ ．

（2）你认为在本实验中与锌片反应的盐酸的质量分数W应该是 _________ ．

（3）实验小组同学认为，用下列两组试剂都可以完成铜与银的金属活动性强弱的比较：A．铜片与AgNO3溶液；    B．银片与Cu（NO3）2溶液．若你来做该实验，所选用的一组试剂是_________（选填字母），相应的实验现象或反应的化学方程式是：_________．
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阅读理解

Once in a blue moon,(极为罕见) there is one on New Year's Eve. Revelers ringing in 2010 will be treated to a so-called blue moon. According to popular definition, a blue moon is the second full moon in a month. But don't expect it to be blue - the name has nothing to do with the color of our closest celestial(天空的) neighbor. A full moon occurred on December 2. It will appear again on Thursday in time for the New Year's countdown.

The New Year's Eve blue moon will be visible in the United States, Canada, Europe, South America and Africa. For partygoers in Australia and Asia, the full moon does not show up until New Year's Day, making January a blue moon month for them.

A full moon occurs every 29.5 days, and most years have 12. On average, an extra full moon in a month - a blue moon - occurs every 2.5 years. The last time there was a lunar double take was in May 2007. New Year's Eve blue moons are rarer, occurring every 19 years. The last time was in 1990; the next one won't come again until 2028.

“Blue moons have no astronomical significance,” said Greg Laughlin, an astronomer at the University of California. “`Blue moon' is just a name in the same sense as a `hunter's moon'(a full moon in octorber) or a `harvest moon,'” Laughlin said in an e-mail.

The popular definition of blue moon came about after a writer for Sky & Telescope magazine in 1946 misinterpreted the Maine Farmer's Almanac and labeled a blue moon as the second full moon in a month. In fact, the almanac(年历) defined a blue moon as the third full moon in a season with four full moons.

小题1:What’s the color of blue moon?

A．blue

B．golden

C．green

D．red小题2:If you are in China, in which month can you see the blue moon?

A．December, 2009

B．November, 2009

C．January, 2010

D．February, 2010小题3:Compared with the hunters moon, the blue moon ________ .

A．is more beautiful

B．is rarer

C．is larger

D．is brighter小题4:Which full moon should be called blue moon according to the original definition?

A．The second full moon in a month with two full moons.

B．The third full moon in a month with three full moons.

C．The second full moon in a season with four full moons.

D．The third full moon in a season with four full moons.小题5:What would be the best title for the passage ?

A．Rare New Year’s Eve Blue Moon to Ring in 2010

B．Blue Moon to Take Us Good Fortune

C．The Best Time to Observe Blue Moon

D．The Reason for Blue Moon’s Appearing
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