第14题: [单项选择]用于观察细菌动力的是() A. 普通肉汤培养基 B. 半固体培养基 C. 固体培养基 D. 选择培养基 E. 琼脂平板 参考答案:B 答案解析:半固体培养法常用于观察细菌的动力,在半固体培养基中,无鞭毛的细菌沿穿刺线生长,有鞭毛的细菌沿穿刺线生长并向周围扩散,使培养基出现浑浊。
第15题: [单项选择]A. Students can lend the books borrowed from the library to others. B. Students may not talk or disturb others in the library. C. Students can put back the books anywhere on the shelves. D. The students far from outside the library should keep quiet. 参考答案:B 答案解析:[听力原文] Q: According to the passage, which of the following statements is true