进行高压交流架空送电线无线电干扰测量时,应当同时监听测量仪的音频输出,以保证测量结果

题型:判断题

问题:

进行高压交流架空送电线无线电干扰测量时,应当同时监听测量仪的音频输出,以保证测量结果不受其他强于扰源如火花放电、线路载波等的影响。

考点:环境监测上岗考试环境空气采样环境空气采样题库
题型:判断题

阅读理解。

Lifts are very useful. Why?Think about a tall building. You work on the thirtieth fIoor. Maybe you can 

walk up all the stairs one time. But can you climb thirty floors to your office every day? Of course not.

In an old lift, a worker is needed. He or she operates it up and down, In a modern lift , there is no worker. People can operate it themselves.

Do you know how to use a lift? Ok, let me tell you. For exarnple, you want to go to the twelfth floor from  the ground floor. First, you must press the button(按键) then the door opens. After that you can get

into the lift. Third,you press the , and the door closes. Fourth ,you press the number, then the lift

takes you up to the twelfth floor. When the door opens again, you can get out of the lift. If you want to go

down to the first floor, you must press the , then do the same. It takes you down there. It is very easy

and fast, Now can you use it?

根据短文内容,判断下列句子正误.正确的在括号内写"T",错误的写"F"。

( )l.  In a modern lift,people can operate it by themselves.

(     ) 2. If you want to go upstairs , you must press the .

(     ) 3. If you want to go down to the first floor ,you must press the.

(     )4.  In a tall building, it is very easy and fast for you to go up and down in a lift.

(     )5.  Lifts are just used for the old people to go up and down in a tall building.

题型:判断题

在安徽省凤阳县小岗村档案室里有这样一份档案表,请你仔细阅读,然后分析一下表中农民收入增加的主要原因是

安徽省凤阳县小岗生产队1976年与1979年收入对比表

时间粮食产量人均口粮人均分配收入
1976年35000斤230斤32元
1979年132300斤800斤200多元
A.新中国成立                         B.土地改革完成

C.家庭联产承包责任制的推行           D.对外开放政策的实施

题型:判断题

伤寒杆菌"O"抗体属于()。

A.IgA

B.IgE

C.IgM

D.IgG

E.IgD

题型:判断题

过磷酸钙与堆肥一起施用能发挥更大肥效。( )

题型:判断题

如果业主准备替换工程师,必须提前不少于( )天发出通知以征得承包商的同意。

A.14
B.21
C.30
D.42

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