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【简答题】
A. Read and listen to a dialogue or a passage twice and choose the best answer. Staff: We're sorry to have kept you waiting so long. Please, come in, madam. I’ll seat you near the window. Customer: Good. Thank you. Staff: How about this seat? Customer: Very fine, thank you. Staff: What would you like, madam? Customer: A coffee, please Make my coffee weak, please. Staff: Our coffee is not too strong. American style coffee. Black or white, madam? Customer: Black, please. Staff: With sugar or without? Customer: Without sugar, please. But l'd like some cream. Staff: Here you are. Anything else? Customer:l’d like a cake. Staft: Chocolate or fruit cake? Customer: Have you got strawberry cake? Staff: Certainly, madam. here you are. Customer: Thank you. Staff: Would you like some more coffee? Customer: No more, thank you. But bring me the check, please. Staff: Please pay at the cashier's desk near the entrance. (At the cashier.) Customer: How much do I owe you? Staff: RMB 80 yuan with 10% service charge in addition, madam. Customer: Here you are. Staff: Thank you, madam. You are welcome to come again. Have a good day. 3. How much is the total charge with service fee? A. 80 yuan B. 88 yuan C. 18 yuan D. 98 yuan
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【单选题】晶体三极管用于放大时应使其发射结、集电结处于
A.
发射结正偏、集电结反偏
B.
发射结正偏、集电结正偏
C.
发射结反偏、集电结正偏
D.
发射结反偏、集电结反偏
【单选题】晶体三极管用于放大时,应使其发射结、集电结处于_______。
A.
发射结正偏、集电结反偏
B.
发射结正偏、集电结正偏
C.
发射结反偏、集电结正偏
【简答题】指出下列复数的实部和虚部: 1 5+2i,2 6-8i,3 4,4 7i-3,5 9i 填写要求:每个小题直接填写数字,中间用“和”连接(即“什么和什么”的形式),先写实部,再写虚部。
【单选题】2018 年 4 月 27 日,《中华人民共和国英雄烈士保护法》由第十三届全国人大常委会第二次会议通过,自 2018 年 () 起施行。
A.
5月1日
B.
6月1日
C.
7月1日
D.
8月1日
【单选题】在纯电感电路中,正确的关系式是( )。
A.
U= LI
B.
U= /I
C.
U=2 fL
D.
U= L
【单选题】设【图片】表示排列的逆序数,则【图片】()。
A.
1
B.
2
C.
3
D.
11
【单选题】设 表示排列的逆序数,则 = ( ).
A.
3
B.
4
C.
5
D.
6
【单选题】设 表示排列的逆序数,则
A.
0
B.
1
C.
2
D.
-2
【单选题】在纯电感电路中,下列关系式正确的是( )。
A.
I=U/L
B.
I=U/wL
C.
I=Um/X L
D.
i=u/XL
【判断题】2018年4月27日,十三届全国人大常委会第二次会议全票通过了《中华人民共和国英雄烈士保护法》,并于2018年5月1日起施行。
A.
正确
B.
错误
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