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【单选题】
当一级负荷的消防应急电源采用自备电源时,其容量应能满足消防用电设备火灾时最少持续供电时间的要求,防排烟设备供电时间至少为( )。A.
10min
B.
30min
C.
60min
D.
180min
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【简答题】要如何提高顾客让渡价值?
【简答题】A．About 200 miles. B．About 1,000 miles. C．About 7,000 miles. D．About 5,000 miles.
【简答题】A．About 700 million light-years from Sun. B．About 700 million light-years from Earth. C．About 700 million light-years from the black hole. D．About 700 million light-years from a galaxy.
【单选题】According to the article, which of the following is NOT true?
A.
In 1995 about 700,000 robots were operating in the industrialized world.
B.
Why people use the robots is that they are neither dangerous nor unpleasant.
C.
In medical laboratories, robots can be used to handle Potentially dangerous materials, such as blood or urine samples.
D.
In other cases, robots are used in repetitive, unchangeable tasks in which human performance might degrade over time.
【简答题】比较下列各数的c小． 300 000 000______c30 000 000 七07 000 000______7 0七0 000 000 七 700 000 000______七 700 000 000 8 700 000 000______870 000 000 8 七00 000 000______8七万 1亿______99 999 999．
【简答题】如何提高顾客让渡价值?
【单选题】How long is the Changjiang River?
A.
About 6 000 km.
B.
About 5 000 km.
C.
About 4 000 km.
【简答题】【实训题】 1.请你调研某一个百货商店或超级市场,利用顾客让渡价值,谈谈如何提高顾客的让渡价值。
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