问题
选择题
--- May I use your mobile phone?
--- _________ .
A．Why not?
B．Go ahead.
C．OK, enjoy yourself
D．Yes, but you’d better not.
答案
答案：B
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--- May I use your mobile phone?
--- _________ .
A．Why not?
B．Go ahead.
C．OK, enjoy yourself
D．Yes, but you’d better not.
答案：B
某产品划分为四个功能区，采用环比评分法得到的功能暂定重要性系数见下表。则功能区芦4的重要性系数为( )。
| 功能区 | 暂定重要系数 | 功能区 | 暂定重要系数 | |
| F1 | 2.0 | F2 | 1.5 | |
| F3 | 2.5 | F4 |
A．0.07
B．0.35
C．0.36
D．0.42