小明家准备给新厨房铺上正方形地砖，通过测量知道厨房的长是3米_爱下问搜题

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问题解答题

小明家准备给新厨房铺上正方形地砖，通过测量知道厨房的长是3米，宽是2.4米，如果让你去购买，你将选择边长是多少的地砖？并说明理由．

答案

3米=300厘米，2.4米=240厘米，

300和240的最大公约数是60，

所以可以选用边长是60厘米的方砖；

因为这样节省铺设时间，提高工作效率，也就节省了工钱开支；

答：将选择边长是60厘米的方砖，因为这样节省铺设时间，提高工作效率，也就节省了工钱开支．

完形填空

Once a farmer had some puppies to sell. He painted a(n)____ advertising the pups and set about nailing it to a post on the edge of his
yard.____he was driving the last nail into the post，he felt a sudden pull on his trousers.He____down into the eyes of a little boy.
“Mister，”he said，“I want to buy one of your puppies.”
“Well，”said the farmer，as he rubbed the sweat off the back of his___，“these puppies come from fine parents and____ a good deal of money.”
The boy____his head for a moment. Then reaching deep into his pocket，he pulled out a handful of____and held it up to the farmer. “I’ve got thirtynine cents. Is that enough to take a look？”
“Sure，”said the farmer.
And with that he____a whistle，“Here，Dolly！”he called.
____from the doghouse and down the road ran Dolly____by four little balls of fur. As the dogs made their____to the fence，the little boy noticed something else moving inside the doghouse.____another little ball appeared，this one noticeably smaller. The little pup began walking unsteadily toward the others，doing its best to____.
“I want that one，”the little boy said，____at the runt (矮个子)．
The farmer knelt down at the boy’s side and said，“Son，you____want that puppy. He will never be able to____and play with you as other dogs would.”
With that the little boy____back from the fence，reached down，and began rolling up one leg of his____.In doing so he showed a steel brace(支柱) running down both sides of his leg attaching itself to a____made shoe. Looking back up at the farmer，he said，“You see，sir，I don’t run too well myself，and he will need someone who understands.” The____is full of people who need someone who understands.

C．information

B．carried out

填空题

低温液体汽化为气体时，体积会迅速膨胀，在标准状态下，一升液氧汽化为（）升气氧、一升液氮汽化为（）升气氮、一升液氩汽化为（）升气氩。