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【单选题】
泡沫灭火系统是采用泡沫液作为灭火剂，主要用于扑救( )。A.
固体表面和电器设备火灾
B.
非水溶性可燃液体火灾
C.
图书馆珍藏室火灾
D.
底层设置商业服务网点的住宅火灾
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【简答题】B. Comprehending the text. Choose the best answer. 1. According to Haley,there is a difference between “ being a writer ” and writing and the latter means____. A. a dream you cherish B. Spending hours...
【简答题】单元机组负荷调节的控制方式有协调、（）、（）三种方式。
【单选题】Task 2 Read the passage again and choose the best answers. 2) Why does the writer think it is dangerous to make contact with strangers sometimes?
A.
Because some strangers are ready to cheat visitors.
B.
Because the writer doesn’t know how to deal with strangers.
C.
Because some strangers are not willing to meet visitors and might even be mentally disturbed.
D.
Because the writer was once attacked by some strangers.
【简答题】单元机组负荷调节方式有协调、 、 三种方式。
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【单选题】显示“职工档案表”数据表中姓名为“张三丰”的记录的语句是________。
A.
SELECT * FROM职工档案表WHERE 姓名=“张三丰”
B.
SELECT * FROM职工档案表WHERE 姓名 LIKE “张三丰”
C.
SELECT * FROM职工档案表WHERE 姓名 LIKE “张三丰*”
D.
SELECT * FROM职工档案表WHERE 姓名 LIKE 张三丰*
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