问题
选择题
Alice _____ some advice on how to improve her listening skills, and she gladly accepted Miss Green' s.[ ]
A. gave
B. was given
C. gives
D. is given
答案
答案：B
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Alice _____ some advice on how to improve her listening skills, and she gladly accepted Miss Green' s.[ ]
A. gave
B. was given
C. gives
D. is given
答案：B
现有两只规格相同未贴标签的试剂瓶，分别装有相同体积的浓盐酸和浓硫酸．请你用三种不同的方法将它们区别开来（每答对一种得2分，超过三种的每答对一种奖励2分，最多奖励4分，总分不超过60分）．
| 方法 | 现象和结论 | |
| 1 | ______ | ______ |
| 2 | ______ | ______ |
| 3 | ______ | ______ |