通过初中和高中有机化合物的学习，你认为下列有关有机化合物的说_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题选择题

通过初中和高中有机化合物的学习，你认为下列有关有机化合物的说法中正确的是[ ]

A．凡是含有碳元素的化合物都是有机化合物

B．所有的有机化合物均难溶解于水

C．易溶解于汽油、苯、四氯化碳的物质就是有机化合物

D．有机物组成元素较少，而有机物的种类繁多，其原因之一就是具有同分异构现象

答案

答案：D

选择题

下列选项中不属于美国各州拥有的权力是（）

A．以地方名义征税

B．管理州内工商业和劳工

C．调控州际及对外贸易

D．组织警卫力量和维持治安

填空题

选词填空。用方框中所给单词的适当形式填空，使短文通顺、正确、连贯（每个单词限用一次）。

it can close try on treat do give time if

     A dog 1____ speak any words, but it can “talk”. It has feelings just as you do. At 2____ it may feel
angry or afraid. Watch a dog 3____ , and you can find out how it feels. You can see what it is 4____ to
tell you. When you are afraid, you may look down. When a dog is afraid, it may run away. When you are
angry with other people, you stare at them and so 5____ an angry dog. Sometimes the hair along 6____
back stands up.
     Do you feel guilty when you have done something you shouldn't do? Dogs can feel guilty, too. At
times when I come home, I'm 7____ a guilty look by my dog. Then I know he has done something wrong.
     Dogs need love and attention. Some dogs are very unhappy when they are left alone for a long time.
Some dogs even snap 8____ they don't get enough attention.
     You may have a dog or you may know a dog. 9____ it well if you want to have fun with it. Play with it.
Take it 10____ walks. Try not to punish it one time and not the next for doing the same thing. Always
remember, a dog has needs and feelings just as you do. Talk to a dog, and it will talk to you .