搜题请搜索小程序“爱下问搜题”
问题 单项选择题

下列方法中，可用于分析与评价工程项目风险的方法是( )。

A．回归分析法
B．横道图法
C．计划评审技术法
D．流程图法

答案

参考答案：C

解析： 常用的项目风险分析与评价的方法主要有调查打分法、蒙特卡洛模拟法、计划评审技术法和敏感性分析法等。

计算题

（6分）如图甲电路所示，电源电压为9V且保持不变，小灯炮标有 “6V  6W”的字样，小灯泡的电流随电压的变化曲线如图乙．

求：（1）小灯炮正常发光时电阻为多少欧?

（2）当电流表的示数为0.7A时，此时小灯泡的电功率为多少瓦?

（3）当电压表的示数为2V时，滑动变阻器连入的阻值是多少欧姆？
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补全对话，情景问答
从方框中选择句子，使对话内容完整 。
A. Is it serious?
B. Does it hurt when l press here?
C. If you have any questions, call me.
D. What's wrong with you?
E. How long  have you been like this?
A: Hello. ____1____
B: I've a bad cough and a headache. I don't feel like eating anything.
A: Do you have any fever?
B: Yes. I felt very cold this morning, but now I'm feeling a little better.
A: ____2____
B: About five days.
A: Let me examine you. Any pain here? ____3____
B: Yes,but only a little.
A: Let me hear your lungs. Please lie down on the couch and I'll examine your belly.
B: ____4____
A: Nothing serious. You just have a flu. Take the medicine three times a day, and get some rest. You
    should up and around in a couple of days. ____5____
B: Thank you.
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