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【简答题】
Directions : Read following is an advertisement from an insurance company. After reading it, you should give brief answers to the 5 questions Important Notice ! Please be advised: the annual testing of the building' s fire and life safety system will be conducted on Wednesday, December 7, 2016 between 8: 00 a. m. — 5: 00 p. m. Each floor will be tested to be certain that the fire and life safety system is working properly. Prior to testing, an announcement will be made, notifying ( 通知 ) you that testing will start. The test will consist of flashing lights and an alarm with voice alert instructions. The alarm will be LOUD and is for testing purpose only. Please be aware the fire doors on each floor' s elevator lobby may be closed. Please plan accordingly. If the fire doors in the elevator lobby are closed, please open them to gain access to the elevator. We appreciate your patience and will conduct the testing as quickly as possible. If you have any questions, please contact the Management Team at 703-549 -9400. Thank you for your cooperation ! 1. When will the annual testing be conducted? On Wednesday,______, 2016 between 8:00 a. m. to 5:00 p.m. 2. Why will the system on each floor be tested? To make sure the fire and life safety system is______ 3. How will people be notified that testing will begin? Through______before testing. 4. What should you do if the fine doors in the elevator lobby are closed? Open the fire doors to______the elevator. 5. What would you do if you have any questions? Contact______at 703 - 549 -9400.
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参考答案:
举一反三
【单选题】下列叙述正确的是(  )
A.
2.4g金属镁变为镁离子时失去的电子数为0.1N A
B.
1mo1/L盐酸中含1mo1HCl分子
C.
在标准状况下,22.4LCH 4 与18gH 2 O所含有的分子数均为N A
D.
22.4L的CO气体与lmolN 2 所含的电子数一定相等
【简答题】计算2012年12月31日总部资产应计提的减值准备。
【单选题】3 0.细辛常用剂量是( )。
A.
3-6g
B.
30g
C.
1-3g
D.
0.3-1g
【单选题】下列说法不正确的是(N A 表示阿伏加德罗常数的值)(  )
A.
28g氮气所含有的原子数目为2N A
B.
4g金属钙变成钙离子时失去的电子数目为0.1N A
C.
1mol甲烷的质量与N A 个甲烷分子的质量之和相等
D.
标准状况下,22.4L甲烷和乙烯混合物所含的分子数为N A
【单选题】下列叙述正确的是(  )
A.
2.4g金属镁变为镁离子时失去的电子数为0.1N A
B.
1 mo1/L盐酸中含1 mo1HCl分子
C.
在标准状况下,22.4LCH 4 与18gH 2 O所含有的分子数均为N A
D.
22.4L的CO气体与lmol N 2 所含的原子数一定相等
【单选题】在SQL语言中,DELETE语句的作用是( )。
A.
删除基本表
B.
删除视图
C.
删除基本表和视图
D.
删除基本表和视图中的元组
【简答题】计算2012年12月31日乙生产线中商誉应计提的减值准备。
【单选题】烷烃分子中C原子的空间几何形状是
A.
四面体形
B.
平面四边形
C.
线形
D.
同一平面
【单选题】下列叙述中正确的是(  )
A.
硝酸的摩尔质量63g
B.
1molCO 2 中含有1mol碳和2mol氧
C.
3molO 2 与2molH 2 O所含原子数相同
D.
H 2 SO 4 的摩尔质量就等于N A 个硫酸分子的质量
【多选题】下列对电动机变频调速系统的描述中哪几项是错误的?()
A.
交一交变频系统,直接将电网工频电源变换为频率、电压均可控制的交流,由于不经过中间直流环节,也称直接变频器
B.
交一直一交变频系统,按直流电源的性质,可分为电流型和电压型
C.
电压型交一直一交变频的储能元件为电感
D.
电流型交一直一交变频的储能元件为电容
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