皮皮学，免费搜题
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【单选题】
( )的工频电流通过人体时,就会有生命危险A.
0.1A
B.
1mA
C.
15mA
D.
50mA
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举一反三
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
【单选题】听力原文：W: Eric Schurenberg is the managing editor of Money Magazine in this August issue, in which this quiz about money personality types appears. Why is it so important to come up with your money pers...
A.
They often take risks.
B.
They're too conservative.
C.
They have no sense of security.
D.
They have no self-discipline.
【单选题】听力原文：W: Hi, John! M: Oh! Hi, Laura! What are you doing here? W: Uh, I'm usually here on weekends. It's my dad's shop. So you are looking for a bike? M: Yeah. Now that the weather is warming up, I thin...
A.
Because she helps her father there.
B.
Because she wants to buy a bike.
C.
Because she is there to meet John.
D.
Because her bike is broken.
【单选题】听力原文：W: Hi, Peter. M: Hi, Laura. W: How was your final? M: Absolutely no idea. Anyway, it's just wonderful to have finished the exam. W: Yeah, to sleep in every morning. M: Well, I've got a lot to do ...
A.
Tennis sets.
B.
Computer and TV set.
C.
Bookcase and book shelf.
D.
Refrigerator and kitchen stuff.
【单选题】低碳钢扭转破坏的断面是（ ），铸铁扭转破坏的断面是（ ），铸铁破坏属于（ ），所以（ ）适合承受扭力。
A.
颗粒状 片状 脆断 低碳钢
B.
片状 颗粒状 脆断 低碳钢
C.
片状 颗粒状 脆断 铸铁
D.
颗粒状 片状 疲劳 低碳钢
【单选题】W：I have a big paper due Monday, but I promise Laura we，d clean the apartment this weekend. What am I going to do? M: Why don’t you just see if Laura can wait for a week or two? Q：What does the man su...
A.
Request one or two roommates to do the cleaning.
B.
Help Laura with her term paper due this weekend.
C.
Get Laura to clean the apartment herself this time.
D.
Ask Laura to put off the cleaning until another week.
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