在等温反应器中,反应热()反应器与环境交换的热量。
A、大于
B、小于
C、等于
D、不小于
参考答案:C
The mother of a 4-year-old asks about dental care for her child. "I help brush her teeth every day and her teeth look healthy. When should I take her to see a dentist" Which of the following responses would be most appropriate
A. "Because you help brush her teeth, there’s no need to see a dentist right now. "B. "Ideally she should have seen a dentist already, but it’s still not too late. "C. "Your child doesn’t need to see the dentist until she starts school. "D. "A dental checkup is a good idea even if no problems are noticeable. "
一国的外汇储备水平越高越好。