Questions 19 to 21 are based on the conversation you have just heard.
A. It gives us sufficient information.
B. It gives misleading information.
C. It lets us know the best product.
D. It fails to convince people.
查看答案
Passage TwoQuestions 29 to 32 are based on the passage you have just heard.
A. Children.
B. Family.
C. Parents.
D. ASPCA
教师应对每位学生的考试情况作出具体的分析指导，不得公布学生考试成绩并按考试成绩排列名次。
A. 对
B. 错
To solve acid rain problems, we must have experts develop high technology.
The scale used to measure acid rain is called______.
微信支付 
支付宝支付