在用伏安法测量电阻时,______表应与待测电阻并联,若在实验中移动滑动变阻器的

题型:问答题

问题:

在用伏安法测量电阻时,______表应与待测电阻并联,若在实验中移动滑动变阻器的滑片,发现两表读数没有随之改变,试分析其可能的原因:______.

考点:伏安法测电阻电压的测量,电压表的使用
题型:问答题

菜温度下将氯气通入氢氧化钾溶液里,反应后得到KCI、KClO、KClO3的混合溶液。经测定ClO和ClO3的浓度之比为11:l,则氯气和氢氧化钾溶液反应时,被还原的氯元素和被氯化的氧元素的物质的量之比为                 (   )

A.1:3                        B.4:3                C.2:l                   D.3:l

题型:问答题

阅读理解。

     Monkeys are clever and lively, but they are naughty and greedy (贪婪的) as well. Whenver they find

delicious food, they will eat enough. What's more, they will take it when they leave. They have suffered

(吃亏) a lot because of this. But they never change this way.

     In India, people use monkey's greed to catch them. Do you know how they can catch monkeys? Here

are some instructions.

    ◆ Make a hole in a big pumpkin (南瓜). The hole must be just right ----neither too big nor too small.

    ◆ Put some jujubes (枣) in the hole.

    ◆ Leave the pumpkin under a tree. Make sure there are some monkeys in the tree.

    ◆ Hide yourself and watch the monkeys.

    As soon you leave, the monkeys can't wait to come down to the pumpkin. When they find a hole in the

pumpkin, they don't know what's in it and one of them can't help putting its hand into the hole to find what

on earth there is. When it touches the jujubes, it will clench (攥紧) some of them in its hand. As a result, it

isn't able to take its fist (拳) out of the hole. You can't come close until this time. Will the monkey drop off

the pumpkin? Don't worry. It prefers the pumpkin than its life. It will run with the pumpkin, clenching its

fist more tightly. In the end, it is caught helplessly.

1. Monkeys haven't changed their way of doing with nice food because they are _______.

A. clever

B. lively

C. greedy

D. naughty

2. "The hole must be just right" means it is _______.

A. big enough for the monkey to put its hand in

B. smaller than a monkey's hand

C. bigger than a monkey's fist

D. bigger than a monkey's hand but smaller than its fist

3. Seeing the hole in the pumpkin, a monkey will _______.

A. be interested in

B. be afraid of

C. run away at once

D. take the pumpkin away in arms

4. Which of the following is true according to the passage?

A. Indians often catch the monkeys in this way.

B. sometimes monkeys are stupid.

C. as soon as the monkeys comes to the pumpkin, you can rush to catch it.

D. In India, monkeys like pumpkins every much.

5. What should we learn from the passage?

A. we should catch monkeys in this way.

B. One mustn't be greedy.

C. We should protect monkeys.

D. Come up with another way to catch monkeys.

题型:问答题

层间错动属于( )。

A.(A) 原生结构面

B.(B) 构造结构面

C.(C) 次生结构面

D.(D) 成岩结构面

题型:问答题

项目经理在整个项目执行过程当中的主要工作包括( )。

A.建立工作基础

B.组建项目团队

C.指导团队工作

D.积极拓展并承接各类项目

E.项目结束阶段的工作

题型:问答题

现场警戒范围与人口密集程度有关。()

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