离子选择性电极的电位测定法有（）。A.标准加入法 B.标准曲线法 C.直接法 D.间

甲苯的危害性是指（）。

A.易燃、有毒性

B.助燃性

C.刺激性

D.腐蚀性

某市政公司承包某路段的改建工程，全长2.5km，工期为当年7月至次年2月。该路段为四快二慢主干道，道路结构层：机动车道为20cm石灰土底基层，45cm二灰碎石基层，9cm粗、4cm细沥青混凝土面层；非机动车道为20cm石灰土底基层，30cm二灰碎石基层，6cm粗、3cm细沥青混凝土面层；两侧为彩色人行道石板。
项目部进场后，项目技术负责人即编制了实施性的施工组织设计，其中规定由项目部安全员定期组织安全检查。该施工组织设计经上一级技术负责人审批同意后，即开始工程项目的实施。
在实施过程中，项目部将填方工程分包给某工程队，当土方第一层填筑、碾压后，项目部现场取样、测试，求得该层土实测干密度，工程队随即进行上层填土工作。监理工程师发现后，立即向该工程队发出口头指示，责令暂停施工。整改完毕符合验收程序后，又继续施工。在一次安全检查中，监理工程师发现一名道路工在电箱中接线，经查证，属违反安全操作规程。
按工程进展，沥青混凝土面层施工正值冬期，监理工程师要求项目部提供沥青混凝土面层施工措施。

问题

沥青混凝土冬期施工应采取的措施是什么

When you stop and think about your high school or college alma mater, were your experiences more positive or negative Do your feelings of (1) in that school have anything to do with whether or not your school was single-sex or coed (2) to send their children to single-sex schools, because they feel both (3) when they study in the company of students of the same sex. They (4) .
For years, only parents who could afford to send their children to private schools, or who had (5) , chose single-sex education for their children. Single-sex schooling was (6) for most American families. Today, however, along with (7) , public schools are experimenting with the idea of (8) .
Girls may be the ones who benefit most from single-sex schooling. Studies have shown that (9) in coed classrooms because teachers sometimes pay more attention to boys. Girls’ (10) toward their studies tends to disappear as they begin to feel less successful. They start to (11) outperform them in math and science. As boys (12) , girls start to lose it. Moreover, adolescence is (13) for girls. As they experience adolescent changes, some girls become depressed, develop an addiction, or suffer from (14) .
In the early 1990s, some influential people said that being in single-sex classes could (15) . Schools across the country began creating single-sex classrooms and schools. But many critics claim that (16) may actually be detrimental to a girl’s education because they (17) of sex differences.
The renewed interest in single-sex schooling (18) among Americans. Those who give it full endorsement believe girls need an all-female environment to take risks and find their own voices. Those who (19) of single-sex schooling wonder whether students’ lack of achievement warrants returning to an educational system that divides the sexes. They believe there is no (20) .

在控制对象的惯性较大，并存在迟延的情况下，控制系统应采用（）规律的调节器，其比例带和积分时间分别取（）和（）

A.PI，较大值，较小值

B.PID，较小值，较大值

C.PI，较小值，较大值

D.PID，较大值，较小值

救生绳最小破断强度应大于等于（）。

A.400N

B.4000N

C.40000N

D.400000N