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【单选题】
听力原文：W: Excuse me, sir. Can you tell me how much it costs to send an airmail letter to Paris? M: That's one dollar if it is not overweight. W: How about postcards? M: That will cost you 80 cents. W: Well, will you first weigh this letter for me? M: OK. The letter is 10 grams overweight, Madam. You'll have to pay 20 cents extra for the overweight. W: Here you are. And I want to buy a 30 cent stamp. M: Well. One 30 and 20 cents extra, that will be $1.50 altogether. W: Here's $2. M: OK. Here's your change. Have a nice day! W: Thank you! (17)A.
At the airport.
B.
In a post office.
C.
In a store.
D.
At a receptionist.
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举一反三
【简答题】样板的定位方法有 、 。
【单选题】关于肾脏对钾盐排泄的叙述正确的是
A.
多吃多排、少吃少排、不吃也排
B.
多吃多排、少吃少排、不吃不排
C.
多吃少排、少吃少排、不吃不排
D.
多吃少排、少吃少排、不吃也排
E.
多吃多排、少吃多排、不吃也排
【简答题】装配中常用的（）方法有划线定位、样板定位、定位元件定位三种。