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听力原文：W: When did you become interested in collecting stamps? M: Oh, when I was about ten years old. It's an exciting hobby. You know, the first postage stamps were issued in Britain in 1840. W: Really? I didn't know that. I did know that the charge for mail delivery before postage stamps was paid by either the sender or the receiver. How much was the usual charge? M: Oh, about ten cents for a short distance. But post offices were losing money with that system. Rowland hill, an Englishman, suggested using postage stamps. Here's a picture of the first two stamps issued. W: They both bear a picture of Queen Victoria. (8)A.
A picture of the British coat of arms.
B.
A picture of the queen's palace.
C.
A picture of Rowland Hill.
D.
A picture of Queen Victoria.
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【简答题】fill in the blanks with the words or expressions provided。 (per room, in the party, under your name, looking forward to,room rate, check ,Twin-bed rooms, available) Reservationist (R): Good morning...
【简答题】计数器在计数过程中，当前值等于设定值时，其常开触点___
【单选题】增值税一般纳税人采取托收承付方式销售货物的，其纳税义务发生时间为：
A.
办妥脱收手续的当天
B.
货物发出的当天
C.
合同约定的收款日期的当天
D.
将提货单交给买方的当天
【多选题】Task 3.1 Listen to the conversation and fill in the blanks with the words or expressions provided in the box.（输入 大写 字母） A . per room； B. in the party； C. under your name； D. looking forward to；...
A.
H
B.
B
C.
I
D.
G
E.
F
F.
E
G.
A
H.
C
I.
J
J.
D
【简答题】计数器在计数过程中,当前值等于设定值时,其常开触点____,常闭触点 ____。复位输入到来时,计数器复位,复位后其常开触点____,常闭触点____,当前值为____。
【简答题】计数器在计数过程中，当前值等于设定值时，其常开触点__闭合_，常闭触点_ __。
【简答题】计数器在计数过程中,当前值等于设定值时,其常开触点________,常闭触点_________。再来输入脉冲时当前值为_______。复位输入到来时,计数器复位,复位后其常开触点__________,常闭触点_____________,当前值为____________。
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