题目

听第10段材料,回答小题。 (1) How many lab sessions will the students have every week? A . One B . Two C . Three (2) What are the students allowed to wear in the lab ? A . Long scarves B . Loose clothes C . Tennis shoes (3) Why should the students avoid mixing liquid with paper? A . It may cause a fire B . It may create waste C .   It may produce pollution (4) What does the speaker mainly talk about? A . Grades the student will receive    B . Rules the students should follow     C . Experiments the students will do 答案: A C A B
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