问题
单项选择题
绝热工程施工，金属保护层应紧贴绝热层或防潮层上，环缝和竖缝采用搭接，其搭接长度为( )m。
A．5～200
B．50
C．80
D．30～50
答案
参考答案：D
解析：绝热工程施工，金属保护层应紧贴绝热层或防潮层上，环缝和竖缝采用搭接或挂扣，缝口朝下以利于防水，搭接长度为30～50mm。用自攻螺丝紧固时，其间距不大于200mm。
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绝热工程施工，金属保护层应紧贴绝热层或防潮层上，环缝和竖缝采用搭接，其搭接长度为( )m。
A．5～200
B．50
C．80
D．30～50
参考答案：D
解析：绝热工程施工，金属保护层应紧贴绝热层或防潮层上，环缝和竖缝采用搭接或挂扣，缝口朝下以利于防水，搭接长度为30～50mm。用自攻螺丝紧固时，其间距不大于200mm。
| 阅读理解。 |
| When you go looking for fossils, don't take too many things with you. A bag full of heavy fossils is quite enough to carry home. But you need to remember: 1.  Take a hammer with you for breaking open rocks (岩石). A hammer is the best kind to use. A pair of glasses will stop flying pieces of stones from hurting your eyes. 2.  A hand lens is useful. You might find fossils that are too small to see clearly. With a hand lens you can examine the small things better. 3.  Take a map of the area you're visiting to show you where you might find the fossils, plus a ruler for measuring(测量) the fossils you find. 4.  A camera will be useful for photographing interesting rocks which stand up out of the ground. That'll help you to remember where you found the fossils. 5.  Number your fossils and wrap (包、裹) them in newspapers before putting them into your bag. 6.  Make sure that your clothing is suitable for the weather in whatever kind of countryside you are visiting. 7.  You have to take a notebook and pencils. As soon as you find something interesting, take a note of where you found it and the kind of rock in which it was found. |
| 1. Because fossils are very heavy, you need to _______. |
[ ] |
| A. take fewer things if possible B. number the fossils which have been collected C. carry a large hammer D. wear light clothing |
| 2. The word "them" in Point 5 means _______. |
[ ] |
| A. newspapers B. photos C. fossils D. rocks |
| 3. Which of the following is TRUE according to the passage? |
[ ] |
| A. A hand lens is used to read the map. B. Newspapers can give some new information. C. A camera is used to take photos of the people who look for fossils. D. A notebook and pencils can be used to record the kinds of rock in which fossils were found. |
| 4. This passage mainly shows the reader _______. |
[ ] |
| A. where to look for fossils B. what is needed when looking for fossils C. how to look for fossils D. when it is the best time to look for fossils |