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某工业厂房工程，桩基础采用预制钢筋混凝土管桩，主体结构采用钢筋混凝土框架结构。业主通过招标选择了某监理单位。沉桩施工任务由业主单独发包。土建及机电安装工程由A施工单位承包，并在施工合同中明确机电安装工程由A施工单位通过招标另行发包。管桩由业主选定的供应单位负责运抵现场。

A施工单位应何时对机电安装分包单位进行考核？考核的主要内容是什么？

答案

参考答案：

在机电安装工程招标阶段进行考核。考核的主要内容：

相应的资质等级；满足工程需要的施工技术装备；合理的人员配置；完善的质保体系；良好的业绩和社会信誉。

问答题

在图中，将实物图连接成串联，要求：导线不能交叉．并画出电路图．
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单项选择题

When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1) population of a region or country which may be (2) grave risk. The process of vaccination allows the patient’s body to (3) immunity to the virus or disease so that, if it is encountered, one can fight it (4) naturally. To accomplish this, a small weak or dead (5) of the disease is actually injected into the patient in a controlled environment, (6) his body’s immune system can learn to fight the invader (7) . Information (8) how to penetrate the disease’s defenses is (9) to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10) the patient later come into contact with the real problem, his body is well equipped and trained to (11) with it, having already done so before.

There are, however, dangers (12) in the process. (13) , even the weakened version of the disease contained in the vaccine proves (14) much for the body to handle, resulting in the immune system (15) , and, therefore, the patient’s death. Such is the case of the smallpox vaccine, (16) to eradicate the smallpox epidemic that nearly (17) the whole Native American population and killed massive numbers of settlers. (18) 1 in 10,000 people who receive the vaccine (19) the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20) , may indeed hide some hidden curses.

3（）

A.eliminate

B.identify

C.develop

D.deliver
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