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【简答题】
Dear Joan, How have you been? I have received your letter. Thank you for the information and it helps me a lot. E-mails have helped us keep in touch with each other, and it’s a good way of communication. But now in China, WeChat is very popular. It is a cellphone application. It’s very easy to use. You can communicate with others as long as you have their WeChat ID. What’s more, you can also use WeChat for shopping and pay for bills and services. If you want to know more about WeChat, please call me. I’d like to help. Best wishes. Yours, Xu Hua 请根据上列短文,选择 "T" , "F" ________ 1) This is an e-mail from Joan to Xu Hua. ________ 2) Sending e-mails is not a good way of communication. ________3) WeChat is an application for computers. ________ 4) You need your friend’s WeChat ID to communicate with him on WeChat. ________5) We can only use WeChat for communication.
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参考答案:
举一反三
【判断题】测量范围即为量程。
A.
正确
B.
错误
【判断题】测量范围即为量程。
A.
正确
B.
错误
【单选题】有一个量程为300V(即测量范围是0~30伏)的电压表,它的内阻是40kΩ,用它测量电压时,允许渡过的最大电流是()。
A.
7.5mA
B.
7.5A
C.
75mA
D.
75A
【单选题】在外界条件不变的情况下,用同一仪表对被测量在仪表全部测量范围内进行正反行程(即被测参数逐渐由小到大和逐渐由大到小)测量时,被测量值正行程和反行程所得到的两条特性曲线之间的差值,称为
A.
变差
B.
反应时间
C.
灵敏度
D.
灵敏限
【简答题】有一只量程为 500V (即电压测量范围为 0-500V )的电压表,它的内阻为 40K Ω。用它测量电压时通过电压表的最大电流是多少?(提示:把电压表看成一个阻值较大的导体)
【单选题】Peter had to wait two hours at the doctor’s ________.
A.
surgery
B.
treatment
C.
changing room
D.
hall
【单选题】Peter had to wait two hour at the doctor's _____.
A.
surgery
B.
treatment
C.
changing room
D.
hall
【单选题】有一个量程为300伏,(即测量范围是0~300伏)的电压表,它的内阻是40千欧,用它测量电压时,允许流过的最大电流是()。
A.
7.5毫安
B.
7.5安培
C.
75毫安
D.
75安培
【单选题】保证测量仪器规定的准确度、满足误差在规定极限之内的量值范围,即为_________。
A.
标称范围
B.
测量范围
C.
示值范围
D.
量程
【单选题】We missed our train, and ________ the next train was delayed, ________ we had to wait for another two hours.
A.
on top of that; so
B.
as a result; thus
C.
what was worse; therefore
D.
apart from that; then
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