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补全对话 A. Great! B. What time does it start? C. I'd like to watch the game very much. D. Between which teams? E. What's up/ Why? (Robert --- R Jack --- J) J: Hello, Robert. Are you free on Saturday morning? R: Yes. (1)_____ J: There is a basketball match at the Sports Center. Do you want to watch it? R: Sure. (2)_____ J: Our school Vs No. 1 Middle School. R: (3)_____ Let's go to cheer for our team. J: Yeah. No. 1 Middle School Team is not easy to beat. R: So the match will be exciting. (4)_____ J: 8:30. Do you think you can get up on time? R: Of course. (5)_____ J: OK. There will be three school buses waiting for us in front of the library. Let's meet there at 8:30. R: All right. See you then.
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【单选题】表面活性剂具有亲水基团和亲油基团的两亲分子,表面活性剂分子中亲水基和亲油基之间的大小和力量平衡程度的量,表面活性剂的亲水亲油平衡值定义为HLB值。在图6的情况下,选择破乳剂的HLB值最恰当的是( )
A.
选择使乳状液稳定性最低点的HLB值
B.
10
C.
2
D.
13
E.
17
【单选题】熟石膏调拌时的水粉比例为
A.
(10～19)ml:100g
B.
(20～30)ml:100g
C.
(31～39)ml:100g
D.
(40～50)ml:100g
E.
(60～70)ml：100g