简述新闻评论的群众性特征。

在冬季，各气控元件应定期活动，防止冻结失灵。

Passage 3

According to the news report, which of the following statements is true a. The shares of 3M fell 9.16% on Tuesday. b. The shares of 3M fell 9.16% on Friday. c. The shares of 3M fell 9.6% on Tuesday. d. The shares of 3M fell 9.6% on Friday.

CFG桩竣工验收时，承载力检验应采用什么方法？

原始趋势的最低点是由下跌行情转为上升行情之最低点，至少在1年中此价位没有再出现；原始趋势的最高点是上升行情转为下跌行情之最高点，同样至少在1年中此价位没有再出现（）

陶瓷制品的成型方法有哪些？