输送介质温度低于２００℃的泵，称为冷油泵。(设备基本知识)_爱下问搜题

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问题判断题

输送介质温度低于２００℃的泵，称为冷油泵。(设备基本知识)

答案

参考答案：对

单项选择题

某项目设计生产能力8000台，每台销售价格为300元，单件产品变动成本150元，年固定成本32万元，每台产品销售税金50元，则该项目的产量盈亏平衡点为（）台。

A.1280

B.1600

C.2133

D.3200

完形填空

One day a few years ago we had a guest of the uninvited variety. In fact, this uninvited guest was a bird--- a(n) __1__, to be more precise(精确地).
“What’s that?” I asked when I first heard the thump(重击声). “It sounds like Joe is outside playing basketball,” my wife, Anita, said. She paused and __2__ more devotedly. “It’s coming from the __3__.” she said. “Maybe it’s one of the little __4__”.
We rushed out the door. Jonathan, our youngest, was easy to make __5__. “If he’s making holes in the wall again…” I said as I searched there. No children at all. But there was that __6_ again, coming from right up there.
And that’s when I __7__ the sparrow. It was flying __8__ just inches below the ceiling. It was clearly trying to __9__, but couldn’t see that the way out wasn’t up, but down and out through the open _10__. So the bird continued beating its wings and hitting its head against the __11__.
“Poor thing,” Anita said. “It must be __12__.”
“Well, maybe it’s because of me,” I said as I moved toward it. I tried to show the bird how to glide (滑翔) down a few feet so it could get outside, __13__ that only seemed to frighten it more.
“Why don’t we just __14__?” Anita suggested. “I’m sure he’ll __15__ eventually.”
So we went back into the house, where we continued to hear the ongoing struggle. Then suddenly, it was __16__. We looked into the garage, and our uninvited guest was __17__.
“See?” Anita said. “I told you he would make it.”
“Yeah,” I said. “But how many knocks on the head did it __18__ him?”
I’ve thought about that little sparrow through the years. Just like that sparrow, we often meet situations we don’t know how to __19__. Born to go upward, we don’t __20__ consider the possibility that something good might happen if we stop flapping(拍打) around and just glide down a little bit.