先秦时期的君子孝道在道德层面上存在这一定的负面影响。
参考答案：对
---I’m worried about the sports meet. Do you think it will be postponed?
----If it ______ rain tomorrow, but actually the weather forecast has removed our worry. [ ]
A. could
B. would
C. might
D. should
简答为什么说DSS的第一级灵活性是面向用户的。
