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【简答题】
阅读理解。 Skin-diving is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon! When you are under water, it is easy for you to climb big rocks, because you are no longer heavy. Here, under water, everything is blue and green. During the day, there is enough light. When fish swim nearby, you can catch them with your hands. When you have tanks of air on your back, you can stay in deep water for a long time. But you must be careful when you dive in deep water. To catch fish is one of the most interesting parts of this sport. Besides (而且), there are many uses for skin-diving. You can clean ships without taking them out of the water. You can get many things from the deep sea. Now you see that skin-diving is both useful and interesting. 1. Skin-diving will take you to _____. [     ] A. the moon B. be in danger C. mountains D. the deep sea 2. You can climb the big rocks under water because _____. [     ] A. you are stronger B. the fish nearby help you C. you are not as heavy as on land D. there is a lot of light 3. Under water, a skin-diver _____ in the daytimes. [     ] A. can see everything clearly B. can't see anything clearly C. can see nothing D. can see only fishes 4. With a tank of air on your back, you can _____. [     ] A. catch fish very easily B. stay under water for a long time C. be in safe place D. have more fun 5. Which of the following sentences is NOT true? [     ] A. Skin-diving is a new sport. B. Skin-diving is like visiting the moon. C. The only use of skin-diving is to have more fun. D. Skin-diving is both interesting and useful
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【简答题】防雷区的划分是以()作为划分的标准。
【单选题】下列关于防烟分区划分的说法中,错误的是( )。
A.
防烟分区可采用防火墙隔划分
B.
设置防烟系统的场所应划分防烟分区
C.
一个防火分区可划分为多个防烟分区
D.
防烟分区可采用在楼板下突出0.8m的结构梁划分
【多选题】下列有关防雷区的划分正确的是:( )
A.
本区内的各物体都可能遭到直接雷击并导走全部雷电流,以及本区内的雷击电磁场强度没有衰减时,应划分为LPZ0A区。
B.
本区内的各物体不可能遭到直接雷击,以及本区内的雷击电磁场强度仍没有衰减时,应划分为LPZ0B区。
C.
本区内的各物体不可能遭到直接雷击,且由于在界面处的分流,流经各导体的电涌电流比 LPZ0B区内的更小,以及本区内的雷击电磁场强度可能衰减,衰减程度取决于屏蔽措施时,应划分为LPZ1区。
D.
需要进一步减小流入的电涌电流和雷击电磁场强度时,增设的后续防雷区应划分为LPZ2…n后续防雷区。
【多选题】下列关于防烟分区划分的叙述中,正确的是()。
A.
防烟分区一般结合建筑内部的功能分区和排烟系统的设置,按其用途、面积、楼层划分
B.
防烟分区不得跨越防火分区
C.
不设排烟设施的部位(包括地下室)、净空高度大于6m的区域可不划分防烟分区
D.
防烟分区的长边一般不大于75m
E.
当室内高度超过6m且具有自然对流条件时,长边可不大于75m
【判断题】地区雷暴日等级宜划分为少雷区、多雷区、高雷区、强雷区。
A.
正确
B.
错误
【多选题】下列关于防烟分区的划分,正确的是()
A.
防烟分区可以用防火隔墙划分
B.
设置防烟分区的场所应划分防烟分区
C.
一个防火分区可以划分为多个防烟分区
D.
可以用楼板下突出0.6m的结构梁划分
【单选题】根据年平均雷暴日的多少,雷电活动区分为()、中雷区、多雷区和强雷区。
A.
无雷区
B.
少雷区
C.
稀雷区
D.
弱雷区
【单选题】某烃完全燃烧后,产物通入下列物质之一时完全被吸收。则产物通入( )。
A.
浓硫酸
B.
碱石灰
C.
氢氧化钠溶液
D.
五氧化二磷
【单选题】For the matrices given below, what would A+B be: A=[1, 0, 0; 0, 1, 0; 0, 0, 1]; B=[-1, 2, 0; 1, -1, 1; 0, 0, -1]
A.
[0, 2, 0; 1, 0, 1; 0, 0, 0]
B.
[1, 0, 0; 0, 1, 0; 0, 0, 1]
C.
[-1, 2, 0; 1, -1, 1; 0, 0, -1]
D.
Cannot get the sum of A and B
【多选题】防烟分区的划分,应符合下列规定()。
A.
设置排烟设施的走道、净高不超过6米的房间,应划分防烟分区
B.
防烟分区不应跨越防火分区
C.
不设置排烟设施的半地下室,净高不超过6米时,应划分防烟分区
D.
每个防烟分区的面积不宜超过500m 2
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