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【单选题】
当溶液 pH=6.5 时,乳 清 蛋白向正向移动,欲使之反方向移动,则应A.
加碱，使 pH.>pl
B.
加酸，使 pH
C.
加水稀释
D.
加入适量电解质
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【简答题】listen to the audio again and fill in the blanks Mom: Okay, Angela and Brian. It’s time to make a schedule for ( 1 ). Angela and Brian: Oh, Mom! Mom: ( 2 ), come on. You two have to help out arou...
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A.
wasn’t finishing
B.
wouldn’t finish
C.
haven’t finished
D.
won’t finish
【单选题】牛顿的科学研究对人类历史和人们日常生活产生了重大影响，主要原因是他（ ）。
A.
发现了浮力定律
B.
建立了完整的力学理论体系
C.
推翻了物种不变论
D.
创立了相对论
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【多选题】A: Sally , are you free tomorrow evening? B: ( 1 ) . A: Why not go to the movies? B: ( 2 ) . I like seeing movies very much. A: ( 3 ) . B: Well, I like comedies because they are funny. What about you...
A.
That’s a good idea.
B.
Yes, I am.
C.
I’m afraid I have no time.
D.
How about half past seven?
E.
What kind of movies do you like?
F.
Where will we meet?
G.
Would you like to go to the movies with me?
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