下述不是共生关系的是：（ C）
A. 根瘤菌和豆科植物
B. 菌根和植物
C. 嗜热菌和温泉
D. 地衣中的藻类和真菌
Are you for or against doing a part-time job?
A. for (If you choose for, please go to Question 2.)
B. against (If you choose against, please go to Question 3.)
Why do you think students should do a part-time job?(You can choose more than one answer.)
A. It provides opportunities for students to cope with stress.
B. It helps students develop social skills.
C. It provides valuable job experience.
D. Students gain financial independence through a part-time job.
E. It helps students use time more wisely.
Why do you think students should not do a part-time job?(You can choose more than one answer.)
A. It affects study.
B. It takes too much time.
C. It may be exhausting.
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