某同学进行体能训练,用了100s 的时间跑上20m高的高楼,则他登楼的平均功率最

题型:不定项选择

问题:

某同学进行体能训练,用了100s 的时间跑上20m高的高楼,则他登楼的平均功率最接近[ ]

A.10W    

B.100W  

C.1kW    

D.10kW

考点:平均功率和瞬时功率的区别
题型:不定项选择

请阅读下列短文。根据短文内容从下面方框的七个选项中,选择五个适当的句子还原到原文中,使短文意思通顺、结构完整,并将其答案填写到答题卷的相应位置。(每小题2分)

The history of the fortune cookie

Do you know about fortune cookie?

小题1:         They not only taste good, but also have a surprise inside. It is a small piece of paper with a meaningful saying printed on it. These sayings usually give people some food for thought.

小题2:         Because Chinese restaurants in China Town usually give customers some free fortune cookies. However, they originated in (起源于) America 小题3:             But some people believe that a Chinese immigrant (移民) , David Jung, invented the fortune cookie in 1918.

David Jung lived in Los Angeles and was the founder of the Hong Kong Noodle Company. He cared about all the poor he saw in the streets hear his shop. 小题4:       Each cookie had an inspirational verse (鼓舞人心的诗句)inside it.

小题5:         But it is the "fortune" inside that matters.

A.No one is sure about who invented the cookie.

B.The fortune cookies have a long history.

C.So he created the cookies and gave they away for free.

D.If you eat the cookies, you'll be a lucky person soon.E. Many people think fortune cookies came from China.

F. That who actually invented the fortune cookie is not important

G. They are common in foreign countries' Chinese restaurants.

题型:不定项选择

未经()同意,不得在威胁铁路安全范围内,设立生产或贮存易燃易爆物品的场所和仓库,进行爆破施工、采矿、采石或引火烧荒。

A.铁路主管部门;

B.安全生产监督管理部门;

C.交通部门;

D.建设行政部门。

题型:不定项选择

过去,大多数航空公司都尽量减轻飞机的重量,从而达到节省燃油的目的。那时最安全的飞机座椅是非常重的,因此只安装很少的这类座椅。今年,最安全的座椅卖得最好。这非常明显地证明,现在的航空公司在安全和省油这两方面更倾向重视安全了。 以下哪项如果为真,能够最有力地削弱上述结论

A.去年销售量最大的飞机座椅并不是最安全的座椅。

B.所有航空公司总是宣称他们比其他公司更加重视安全。

C.与安全座椅销售不好的那些年比,今年的油价有所提高。

D.由于技术创新,今年最安全的座椅反而比一般座椅的重量轻。

题型:不定项选择

患儿男,2岁,反复咳嗽和喘息发作6个月,夜间为甚。体格检查:双肺可闻及哮鸣音和粗湿啰音,余无异常发现。外周血WBC7×10/L,N0.51,L0.49。

若急诊胸片提示左侧气胸,应立即采取哪些措施()。

A.气管插管,人工机械通气

B.胸腔穿刺排气

C.闭式引流

D.加强抗感染

E.β受体激动剂雾化吸入

F.吸痰

题型:不定项选择

初产妇,宫口开全1.5小时,胎头已达盆底,持续性横左枕位。处理应是

A.催产素静脉滴注
B.等其自然回转
C.人工协助顺时针转90°
D.人工协助逆时针转90°
E.行会阴后-斜切开术

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