问题 选择题

下表中物质的分类组合正确的是 [ ]

 
强电解质
弱电解质
非电解质
A.
Al2(SO4)3 
H3PO4
CO2
B.
BaSO4 
H2O
NH3·H2O
C.
HF
CaCO3
NH3
D.
KClO 
Al(OH)3
HI
答案

答案:A

填空题

请用下列单词或短语的适当形式填空.(有多余选项)

satisfy,   supply,    lead,     would rather ,     struggle,     whatever,     confuse,      work,     rid,                   sunburn,       prefer to,       certain

     There was an old goat that grew a lot of cabbages. He gathered in all his cabbages with the

help of two rabbits. Then he gave each of them ten cabbages to express his thanks. But the goat

got   1 when he found that one of them was very happy while the other was not that happy. So the

goat asked him, "You are not     2 with this?"

     "No, no. Thank you very much for the cabbages. But if I have a choice I would   3 choose

something else," said the rabbit.

     "Ok, you can choose   4 you like from what I have."

    "I wonder if you can teach me to grow cabbages," the rabbit said. "I often can't get enough food

to eat. If I want to    5 a good life, I must grow something of my own. So, I    6 learn to work the

land from you than just accept your cabbages."

     "  7 the land is not that easy. In spring, you must   8   the land of grass; in summer, your skin will

be    9 working in the field and in autumn, you must   10 against bad weather to get in your crops.

Did you really decide to do so?" the goat asked.

     "Yes. I've made up my mind."

     "Ok!"

     With the help of the goat, one year later, the rabbit got a lot of cabbages of his own.

单项选择题