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【判断题】
对酸、碱等腐蚀性试剂,采用中和法(强酸只能用强碱中和,弱酸只能用弱碱中和)。
A.
正确
B.
错误
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【判断题】La jeune fille va à l'aéroport.
A.
正确
B.
错误
【单选题】Grammar: In Columbus' (哥伦布)days, people_______that the Earth was flat.
A.
believe
B.
believed
【单选题】How did Malcolm X move from basic literacy toward true proficiency?
A.
By repeatedly thinking about his learning strategies.
B.
By repeatedly copying the roots of different words.
C.
By repeatedly reading what he copied from the dictory.
D.
By repeatedly logging some important things.
【单选题】How did Malcolm X move from basic literacy toward true proficiency?
A.
By repeatedly thinking about his learning strategies.
B.
By repeatedly copying the roots of different words.
C.
By repeatedly reading what he copied from the dictionary.
D.
By repeatedly logging some important things.
【单选题】共射极放大器的静态工作点包括:
A.
I EQ , I CQ , U BEQ
B.
I BQ , I CQ , U BCQ
C.
I BQ , I CQ , U CEQ
【单选题】公关接待人员迎接客人上下楼梯时应注意()
A.
上楼时公关人员在前引路,下楼时客人先下
B.
下楼时公关人员先下,上楼时公关人在前引路
C.
上楼时客人先上,下楼时公关人员先下
D.
上楼时客人先上,下楼时客人先下
【单选题】在图示电路中,已知3DG4的β=30,则有关静态时的IBQ、ICQ、UCEQ的估算值正确的是()。【图片】
A.
IBQ=258μA,ICQ=8.0mA,UCEQ=4V
B.
IBQ=62.4μA,ICQ=1.9mA,UCEQ=16.2V
C.
IBQ=385μA,ICQ=11.9mA,UCEQ=-3.8V
D.
IBQ=220μA,ICQ=6.6mA,UCEQ=6.8V
【单选题】在图示电路中,已知3DG4的β=30,则有关静态时的IBQ、ICQ、UCEQ的估算值正确的是()。
A.
IBQ=258μA,ICQ=8.0mA,UCEQ=4V
B.
IBQ=62.4μA,ICQ=1.9mA,UCEQ=16.2V
C.
IBQ=385μA,ICQ=11.9mA,UCEQ=-3.8V
D.
IBQ=220μA,ICQ=6.6mA,UCEQ=6.8V
【单选题】接待人员迎接客人上下楼梯时应注意 。 ( )
A.
、上楼时接待人员在前引路,下楼时客人先下。
B.
、下楼时接待人员先下,上楼时接待人在前引路。
C.
、上楼时客人先上,下楼时接待人员先下。
D.
、上楼时客人先上,下楼时客人先下。
【简答题】How did Malcolm X move from basic literacy toward true proficiency?
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