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脂肪球膜具有保持( )稳定的作用。

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乳浊液
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SAM: Hi. How’s your report coming along?KATIE: Not too bad, {A.You don’t need to go to the boss’s office to give him the U disk.; B.I’ve already done about4000 words.; C.Yeah, I also need to get the e-mail address of the team members who need a copy.; D.No, I’m not sure how he wants it, a hard copy, on U disk or by email.; E.Have you managed to figure out how to use that scanner yet?}SAM: It’s nearly finished, isn’t it?KATIE: Yeah, I’ve got to check the spelling, then scan and insert a few pictures,do a bit more copy and paste from other files, and it will be donE.SAM: {A.You don’t need to go to the boss’s office to give him the U disk.; B.I’ve already done about4000 words.; C.Yeah, I also need to get the e-mail address of the team members who need a copy.; D.No, I’m not sure how he wants it, a hard copy, on U disk or by email.; E.Have you managed to figure out how to use that scanner yet?}KATIE: Ha, yeah. Eventually I had to ask my secretary to tell me how to use it.SAM: Have you run off a copy of the report for the boss yet?KATIE: {A.You don’t need to go to the boss’s office to give him the U disk.; B.I’ve already done about4000 words.; C.Yeah, I also need to get the e-mail address of the team members who need a copy.; D.No, I’m not sure how he wants it, a hard copy, on U disk or by email.; E.Have you managed to figure out how to use that scanner yet?}SAM: Maybe an e-mail would be the easiest if the file size is not too largE.{A.You don’t need to go to the boss’s office to give him the U disk.; B.I’ve already done about4000 words.; C.Yeah, I also need to get the e-mail address of the team members who need a copy.; D.No, I’m not sure how he wants it, a hard copy, on U disk or by email.; E.Have you managed to figure out how to use that scanner yet?} He can read it on his computer when he has the timE.It saves paper, too.KATIE: {A.You don’t need to go to the boss’s office to give him the U disk.; B.I’ve already done about4000 words.; C.Yeah, I also need to get the e-mail address of the team members who need a copy.; D.No, I’m not sure how he wants it, a hard copy, on U disk or by email.; E.Have you managed to figure out how to use that scanner yet?}
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Jane: Hi, welcome to Hal’s Computer WorlD.{A.Does he have any brand preference?; B.How much is it?; C.I’ll come back to buy it this weekenD.; D.Can I help you?; E.How about this one?}Smith: I would like to buy a computer for my son. I was told it is cheaper to buy computers herE.Do you have any recommendations?Jane: Yes. We have plenty of choices for you. So, home computer or a laptop, which one does he like? {A.Does he have any brand preference?; B.How much is it?; C.I’ll come back to buy it this weekenD.; D.Can I help you?; E.How about this one?}Smith: He prefers ASUS(华硕), laptop, which is much more convenient.Jane: I seE.{A.Does he have any brand preference?; B.How much is it?; C.I’ll come back to buy it this weekenD.; D.Can I help you?; E.How about this one?} ASUS F83E335Cr-SL. It is really suitable for students.Smith: Let me seE.Well, it’s good but I don’t think 320 GB is enough.Jane: If you wish to upgrade the hard drive, we can definitely do so. It costs 150 to upgrade it from 320GB to 500GB.Smith: Great. My son likes keeping a lot of movies and pictures on the hard drivE.Jane: No problem. I’ll give you a more detailed brochure later.Smith: Thank you. {A.Does he have any brand preference?; B.How much is it?; C.I’ll come back to buy it this weekenD.; D.Can I help you?; E.How about this one?} May I have a discount?Jane: In total it costs 3900 yuan. If you pay for it on Saturday or Sunday this week, you can actually get 5 percent off the usual sale pricE.Smith: Wow. That’s really gooD.{A.Does he have any brand preference?; B.How much is it?; C.I’ll come back to buy it this weekenD.; D.Can I help you?; E.How about this one?}
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