问题 问答题 简答题

煤中水分的测定原理?

答案

参考答案:

煤中水分大多采用间接测定方法,即将已知质量的煤样放在一定稳定的烘箱或专用微波炉内进行干燥,根据煤样水分蒸发后的质量损失计算煤的水分。

阅读理解

Farmer John and Farmer Bob were neighbours. For more than 30 years, they had been getting along very well.

Then their good relationship broke. It began with a small thing, then bitter words, and then weeks of silence. One morning Farmer John woke up to find a stream between the two farms. “It must be Bob,” John thought.

Then one day there was a knock on John’s door. He opened it to find a carpenter(木匠) standing at the doorway.

“I’m looking for a few days’ work,” the carpenter said.

“I do have a job for you,” John said. “Look across the stream at that farm. That’s my neighbour Bob. He dug a stream between the two farms. I want you to build a fence—an 8-foot fence. I don’t want to see his place or his face any more. I don’t have such a neighbour!”The carpenter said, “I think I know what to do, sir, and I’ll be able to do a job that pleases you.” Farmer John helped the carpenter get the materials ready and then he was off for the day. About sunset when the farmer returned, the carpenter had just finished his job. The farmer’s eyes opened wide. There was no fence there at all!

It was a bridge! And the neighbour, Bob, was coming across, with his hand outstretched(伸出). “Hi, John! You’re quite a fellow to build this bridge!”

Then they met in the middle, taking each other’s hands. “I’m terribly sorry for what I have said and done. We should be good to each other.” said Farmer Bob. Then they turned to see the carpenter, who was ready to go. “No, wait! Stay a few days. I have a lot of other jobs for you,” said Farmer John. “I’d love to stay,” the carpenter said, “but I have more bridges to build.”

小题1:What does the sentence “You’re quite a fellow to build this bridge!” mean?

A.John was great to build this bridge.

B.John was not good at building bridges.

C.John was foolish to build such a bridge.

D.John should build the bridge earlier.小题2:What do you think of the carpenter?

A.Shy.

B.Wise.

C.Proud.

D.Careless.小题3:What is the best title for the passage?

A.What a Big Fence!

B.A Strong Bridge.

C.Three Kind Men

D.A Fence or a Bridge ?

判断题