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【简答题】
阅读理解。 Every 30 seconds there is an earthquake. But don't worry because most are so weak that they cannot be felt. Only a few big ones hurt people. Many earthquakes happened in China, such as the big one in Sichuan last month. Thousands of people died in it. So it's important to know what to do when one hits. Here are some tips on how to stay safe in an earthquake. a. If you are indoors during an earthquake, hide under a desk. Stay away from windows and anything that could fall on you. b. If you are outdoors, move to a clear place. Try to be away from trees, signs, buildings and streetlights. These could fall on you. c. If you are in a shop and far from the door, don't try to run outside and rush for exits (出口). Everyone will be doing that and you'll find it hard getting out. Don't get into a lift during an earthquake. Just hide under some strong cover near you. d. When an earthquake has ended, be careful because aftershocks may still happen. These are just as dangerous as the earthquake itself. So stay under the desk until you make sure it's safe to get up. e. If you are at home and you smell gas (煤气), open the windows and get out of the building as quickly as you can. A gas line in your house may be broken. This could be very dangerous. 1. Most earthquakes are too ______ to hurt people. [     ] A. strong B. weak C. dangerous D. scary 2. If you are outdoors, it would be safe to ______. [     ] A. go to a playground B. stay under a tree C. stand by the window D. stay near the signs 3. If you're in a shop and far from the door, you'd better _______. [     ] A. rush to the door right away B. run after the people quickly C. hide yourself under a cover near you D. try to rush for exits 4. The best title of this passage is '_______'. [     ] A. How dangerous the earthquake is B. How to be safe during an earthquake C. Don't be afraid of the earthquake D. An earthquake can hurt people 5. Which of the following statements is TRUE according to the passage? [     ] A. Most earthquakes are very dangerous, so we must be very careful every day. B. You'd better keep away from those things that may fall on you wherever you are. C. If you smell gas at home, try to hide under a desk and don't run outside quickly. D. Quite a few earthquakes hurt people.
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【判断题】激光加工不需要加工刀具,所以不存在工具损耗问题。( )
A.
正确
B.
错误
【单选题】现在将1mL某溶液加到9mL蒸馏水中,进行稀释,问稀释后溶液的稀释倍数是( )倍,稀释度是( )。
A.
8和1/8
B.
9和1/9
C.
10和1/10
D.
不知道
【简答题】某校研究小组为探究KI溶液的pH与其在空气之中氧化变质的关系,进行了相应的实验探究。 【提出假设】 假设1:只有碱性环境下能被氧化 假设2:只有酸性环境下能被氧化 假设3:只有中性环境下能被氧化 假设4: 能被氧化 【实验探究】 (1)有人认为由于I 2 会和KOH反应,因此否定假设1。小组同学认为,若溶液的碱性较弱时,I2不会反应。为了验证滚点,小组同学进行了下述实验: 在编号为①②③的试管中加...
【简答题】(9分)如图是某同学设计的放热反应的观察装置。 其实验顺序是:①按图所示将实验装置连接好。 ②在U形管内加入少量红墨水(或品红)溶液。打开T型管            螺旋夹,使U形管内两边的液面处于同一水平面,再夹紧螺旋夹。③在中间的试管里盛1 g氧化钙,当滴入2 mL左右的蒸馏水后,同时打开螺旋夹即可观察。 试回答:(1)实验中观察到的现象是 (2)该实验中必须进行的一步实验操作是 (3)该实...
【单选题】使用()对齐工具可以方便地将一个Box设置在圆锥的锥面上。
A.
Align
B.
Normal align
C.
Align Camera
D.
Align View
【单选题】使用 对齐工具可以方便地将一个长方体对齐球体的某个面。
A.
法线对齐
B.
高光对齐
C.
快速对齐
D.
对齐
【单选题】使用下面的哪一个对齐工具可以方便地将一个Box放置在圆锥的锥面上( )
A.
Align
B.
Normal Align
C.
Align Camera
D.
Align View
【单选题】下列有关挫裂创叙述错误的是
A.
常伴有表皮剥脱、皮下出血
B.
创壁光滑、整齐
C.
创腔常见组织间桥
D.
常伴有骨折
【判断题】激光加工不需要加工刀具,所以不存在工具损耗问题。
A.
正确
B.
错误
【单选题】使用( )对齐工具可以方便地便地将一个 BOX 对齐球体的某个面
A.
Align
B.
NormalAlign
C.
Aligncamera
D.
AlignView
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