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【简答题】
下面是一个算法的流程图，回答下面的问题：当输入的值为3时,输出的结果为
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【单选题】一束单色光通过厚度为 1cm 的有色溶液后,强度减弱 20% ,当它通过 5cm 厚的相同溶液后,强度将减弱( )
A.
42%
B.
58%
C.
67%
D.
78%
【单选题】The stable voltage of Zener diode is， D1 6V and D2 8V respectively, as shown in the figure below, what is the output voltage?【图片】
A.
8.7V
B.
6.7V
C.
3V
D.
20V
【简答题】金属切削过程中切削热的来源主要有两个，即（）和（）
【单选题】For this clipping circuit, what is the minimum output voltage when the diode is conducting?【图片】
A.
- 16.97 V
B.
+ 16.97 V
C.
- 17.97 V
D.
- 1.0 V
【单选题】I'd like to go to Beijing by plane but I don't have got enough to pay for the ______.
A.
plane
B.
journey
C.
road
D.
way
【单选题】Each room in this building has its own special __________.
A.
link
B.
links
C.
feature
D.
features
【单选题】______ he can recover soon, I don't mind how much money I have to pay.
A.
So long as
B.
So far as
C.
In case
D.
When
【简答题】Guest: That's fine. Shall I send you a ?（订金） Receptionist: No, you don't have to, you may pay on arrival.A. deposit
【单选题】以下删除数据表abc的SQL语句，正确的是( ) 。
A.
delete abc;
B.
delete table abc;
C.
drop table abc;
D.
drop abc;
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