What does the man want to know from Jessica？
A. What Mr. Haddock"s class taught.
B. What Mr. Haddock"s assignment is.
C. What the answer to Mr. Haddock"s homework is.
D. What textbook Mr. Haddock uses in his class.
查看答案
When would the woman and her friends travel cheaper？
A. During July.
B. In the next year.
C. In late June.
D. In a fortnight.
Why did the woman have to stop playing the volleyball game？
A. She had to go home.
B. She was too tired to continue.
C. She had to finish her school work.
D. She was thirsty.
How to Close the Achievement Gap
哪项能够决定组分是否能被电泳法分离
A. 保留时间
B. 峰面积
C. 电泳淌度
D. 电渗
E. 理论塔板数
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