More than one student in our class _____

下列()不属于班组长的安全生产责任。

A、经常进行安全检查，发现问题及时解决

B、开展事故预防工作

C、认真执行交接班制度

D、组织有关部门对从业人员进行安全技术培训和考核

根据《生产安全事故报告和调查处理条例》的规定，一般事故由()组织调查。

A.设区的市一级人民政府

B.县级人民政府

C.省级人民政府

D.国务院

金刚石钻进用的钻杆的性能为什么要求比常规钻进用的钻杆高？

The trend toward smaller families may not be as modern as we think. Although women gatherers had four or five children, only two (36) survived childhood — the number found in the (37) American family today. Even our style of (38) children is starting to parallel hunting-gathering communities, in which girls and boys are permitted to play together from a young age, and consequently experiment at sex earlier and engage in (39) marriages. Clearly, we’ve moved away from the agricultural custom of arranged marriages and insulating girls at home to (40) their virginity. Moreover, the home is no longer the "place of production", as it was in farm days. We don’t make our soap, grow our vegetables and kill chickens for the dinner table. Instead, we hunt and gather in the grocery store and return to our "home base" to consume the food we have collected. No wonder we are so in love with fast food. It probably goes back to an eating strategy our primate relatives (41) over 50 million years ago. There’s no mistaking the (42) : Humans are once again on the (43) (44) . (45) By equality, I mean a more equitable division of power -- not that our roles will converge. Alike men and women have never been and never will be. (46) .

120型控制阀局减阀由（）、局减阀膜板、O形橡胶密封圈、局减阀杆、局减阀簧、压垫、毛毡等组成。

A.局减活塞

B.缓解阀活塞

C.主活塞

D.涨圈