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【简答题】
Number 4: Italy Woman: I’d like some flowers. Uh ... those. About 1.____, I guess. Man: Ma’am, I don't think you should give ten flowers. In Italy, 2._______ — 2, 4, 6, and so on — are bad luck. Woman: Even numbers are 3._______? OK, I'll take 4.______ flowers then. Number 5: Japan Woman: May I help you? Man: I’m going to stay 5.________ in Japan. I need to get something for them. Woman: 6._______ are always a good gift. Man: Oh, that’s a good idea. Let’s see ... There are sets with a 7._______ ... and bigger sets with four pens. Woman: You said you're going to Japan? Man: Yeah. Woman: Don’t give a set of 8._____ pens — in fact, don’t give four of anything. Man: Why not? Man: Thanks for telling me. I’ll take the pen and pencil set. Woman: Good choice. These sets make very good gifts. After all, pens write 9.________! Man: Uh ... yeah. Right. Woman: The Japanese word for “four” sounds like the word for “10._______.” It’s bad luck.
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【单选题】电路如图所示,设晶体管工作在放大状态,欲使静态电流 减小,则应(〕。
A.
保持 , 一定,减小
B.
保持 , 一定,增大
C.
保持 , 一定,增大
【简答题】起升机构采用哪几种类型电机?各有什么优缺点?
【单选题】如电路图 所示,设晶体管工作在放大状态,欲使静态电流 I C 减小,则应( 〕。
A.
保持 U CC , R B 一定, 减小 R C
B.
保持 U CC , R C 一定,增大 R B
C.
保持 R B , R C 一定,增大 U CC
【单选题】大失血可导致:
A.
气滞
B.
气脱
C.
气虚
D.
气逆
E.
气闭
【判断题】电容具有隔直流通交流的特性。( )
A.
正确
B.
错误
【判断题】电容具有隔直流通交流的特性。
A.
正确
B.
错误
【单选题】大失血可导致()
A.
气脱
B.
气滞
C.
气虚
D.
气逆
E.
气结
【单选题】电路如图所示,设晶体管工作在放大状态,欲使静态电流Ic减小,则应()。
A.
保持Ucc,RB一定,减小RC
B.
保持Ucc,RC一定,增大RB
C.
保持RB,RC一定,增大Ucc
D.
保持RB一定,增大Rc
【简答题】由于GSM系统的通信信号是以突发脉冲的方式发送,在整个通信过程中只有1/8的时间在发射信号。用户所熟悉的GSM手机发射功率0.8~2瓦,是指在信号发射时的最高功率,实际功率只有0.1~o.25瓦;而窄带CDMA在通信过程中采用的是信号连续发射,标明的发射功率是平均功率,指标为0.241瓦。因为“SAR”值的计量是一个单位时间的累计过程,因此可以说GSM和CDMA手机的电磁辐射值处于同一个水平。 下...
【单选题】What is the meaning of the term “valve clearance”?
A.
the clearance between the rocker arm and valve pushrod
B.
the clearance between the valve spindle disc and seat
C.
the clearance between the rocker arm and camshaft pushrod
D.
the clearance between the rocker arm and valve pushrod in either warm or cold state
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