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【单选题】
苯二氮卓类药物在7位引入电子取代基时,活性明显性增强,引入( )活性最强。A.
NO2
B.
Br
C.
CF3
D.
Cl
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举一反三
【单选题】Delivering excellent service always comes back to the same three things
A.
Being friendly, welcoming your guest, asking questions
B.
Welcoming your guest, knowing your job, giving out free things
C.
Consciously engaging your guest, knowing the scope of your job and a positive attitude.
D.
Create an experience, be happy and friendly, be open to new cultures
【简答题】比较茯苓与猪苓的粉末特征。
【单选题】Accrding to the passage, what can we expect in the legal profession in the future?
A.
There will be more male lawyers.
B.
The number of female lawyers will rise.
C.
The salaries of female lawyers will increase.
D.
Male and female lawyers will get equal pay.
【单选题】以下说法错误的是（）。
A.
低压断路器的额定电压不得低于线路额定电压
B.
低压断路器的额定电流不应小于线路计算负荷电流
C.
低压断路器的极限通断能力不应大于线路最大短路电流
D.
低压断路器瞬时过电流脱扣器的整定电流应小于线路末端单相短路电流的2/3
【多选题】低压断路器的选用原则主要有（ ）。
A.
断路器的额定电压和额定电流不小于线路、设备正常工作电压和计算负载电路
B.
热脱扣器的整定电流等于所控负载的额定电流
C.
电磁脱扣器的瞬时脱扣整定电流应大于负载正常工作时可能出现的峰值电流
D.
欠电压脱扣器的额定电压应等于线路的额定电压
E.
断路器的极限通断能力应不小于电路最大短路电流
【简答题】猪苓的粉末不同于茯苓的特征包括 （ ）
【单选题】Which of the following should be included in a closing speech?
A.
Welcoming the guests
B.
Introducing the host and the event
C.
Giving a review and summary of the event
D.
Building anticipation for the meeting
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