要保证水泵不汽化,必需的汽蚀余量必须()有效汽蚀余量。 A.大于 B.小于 C.等于

题型:单项选择题

问题:

要保证水泵不汽化,必需的汽蚀余量必须()有效汽蚀余量。

A.大于

B.小于

C.等于

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题型:单项选择题

阅读表达。阅读下面短文,根据短文内容回答下列问题。

     Imagine this: your parents go away on business, but you have to stay at home alone. Would life be as

easy as when your parents are around? Would it be a perfect holiday for you?

     "I can fill an empty stomach with tomato and egg soup, but that's all. I think many of my classmates

are the same. We wouldn't know what to do, or how to look after ourselves," said Zheng Chenyu. "And

I'd forget something important. I'd probably watch television and burn the soup."

     "As soon as I leave home, I'll learn to cook. But now parents do almost everything for us. We're very

lazy,"she said.

     Most teenagers have only time for their homework. They don't learn any life skills until they go to

college.

     However, Sima Yige doesn't think so.

     "I think I'd be all right. I wouldn't just eat sandwiches or fruit. I know how to cook, some sim-ple dishes

because my mum showed me," the 13-year-old boy said. In his opinion, many teen-agers depend too much

on their parents, and there is much more to learn than cooking, like "tidying up your room or even dressing

yourself properly."

     For most teenagers it wouldn't be a holiday at all.

1. Why would Zheng Chenyu probably burn the soup?

    _____________________________________________________________________________________

2. When will Zheng Chenyu learn to cook?

    _____________________________________________________________________________________

3. Translate the underlined sentence "They don't learn any life skills until they go to college." in this passage.

    _____________________________________________________________________________________

4. The underlined phrase "depend too much" on in the passage means __________ in Chinese.

5. Would life be as easy for teenagers living alone as when their parents are around?

    _____________________________________________________________________________________

题型:单项选择题

已知关于x的方程5x+3k=24与方程5x+3=0的解相同,则k的值为_________

题型:单项选择题

(71-73题共用题干)  患儿5岁半,右下后牙肿疼2日。检查:右下第二乳磨牙冠大部分破坏,龋洞较深,叩(+)松动2度,颊侧牙龈处有0.5mm.×0.5mm脓肿。X线片示根吸收1/3,根分歧有低密度影。6根形成8期,上方骨板消失

如果治疗后右下第二乳磨牙仍然松动,症状不缓解,应做何种处理

A.完善根管治疗

B.开放,定期换药

C.拔除做功能保持器

D.拔除作远中导板保持器

E.拔除,待第一恒磨牙萌出后矫治

题型:单项选择题

构成合同文件的有( )。

A.中标通知书

B.材料设备采购单

C.通用条件

D.招标文件

E.投标书

题型:单项选择题

有限空间容积较大时,应对上、中、下各部位取样分析,保证受限空间任何部位的有害物质含量()。

A、合格

B、不合格

C、超标

D、过高

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