关于复称的说法正确的有（）.A.允许出现司机在车道称重后将车辆倒出到其他车道称重的现

乙脑早期诊断的检测方法应首选

A．血液标本中直接分离病毒

B．中和试验

C．补体结合试验

D．以上任何都可以

E．IgM抗体捕获的ELISA试验

路由器的结构和功能是怎样的？

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适适的词或使用括号中词语的正确形式填空，并将答案填写在答卷标号的相应位置上。

There are times when people are so tired that they fall asleep almost anywhere. We can see a lot of people sleeping on the bus or train on their way home   小题1:  work in the evening. A man will be reading the newspaper, and seconds later it appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger sitting next to him. Another place where   小题2: (plan) short sleep goes on is in the lecture hall   小题3:  a student will start snoring so loudly that the professor has to ask  小题4:  student to shake the sleeper awake. A more   小题5: (embarrass) situation occurs when a student starts falling into sleep and   小题6:  weight of the head pushes the arm off the desk, and the movement carries the rest of the body along. The student wakes up on the floor with no memory of getting there. The   小题7:  (bad) time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go off the road.   小题8:  the drivers are lucky, they are not seriously hurt. One woman’s car, for example, went into the river. She woke up in four feet of water and thought that it   小题9: (rain). When people are really tired,  小题10:  will stop them from falling asleep — no matter where they are.

高血压防治中健康教育的对象是（）

A.高血压病高危人群

B.全人群

C.学龄期儿童

D.中老年人群

E.高血压病人

某20层办公楼，建筑面积32000㎡，总高度71m，钢筋混凝土框架一剪力墙结构，脚手架采用悬挑钢管脚手架，外挂密目安全网，以塔式起重机作为垂直运输工具，2011年11月9日在15层结构施工时，吊运钢管时钢丝绳滑扣，起吊离地20m后，钢管散落，造成下方作业的4名人员死亡，2人重伤。经事故调查发现：（1）作业人员严重违章，起重机驾驶员因事请假，工长临时指定一名机械工操作塔式起重机，钢管没有捆扎就托底兜着吊起，而且钢丝绳没有在吊钩上挂好，只是挂在吊钩的端头上。（2）专职安全员在事故发生时不在现场。（3）作业前，施工单位项目技术负责人未详细进行安全技术交底，仅向专职安全员口头交代了施工方案中的安全管理要求。

对本起事故，专职安全员有哪些过错？