潜望镜是利用______对光线的反射作用制成的;放大镜是利用______可以成放

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问题:

潜望镜是利用______对光线的反射作用制成的;放大镜是利用______可以成放大的虚像的原理制成的,使用放大镜时,必须把被观察到的物体放在______;汽车的观后镜是利用______来达到扩大视野的目的;太阳灶是利用凹镜能把太阳光______在焦点的性质制成的.

考点:平面镜成像的应用球面镜(凸面镜、凹面镜)凸透镜对光的作用
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SECTION C(12分)

Directions: Complete the following passage by filling in each blank with one word that best fits the context.

Good morning and welcome to Scotland. I hope you had a good journey and are not too tried 48.          morning. My name is Ada and I am here to help 49.           . I want to tell you a few things 50.           you may find useful. Firstly, the banks. They are open from nine thirty in the morning until four o’clock in the afternoon. That’s nine thirty until four. They are open every day 51.          Sunday. But on Sunday you can change money in the hotel. Second, the buses. You can take a bus from the hotel to the city center. It’s the number twenty – one. You may find 52.            very convenient to travel by bus here because there are buses every ten minutes 53.              you won’t have to wait long. You’ll find the bus stop outside the hotel. A ticket to the city center costs sixty pence. 54.             ,tonight we’re having a party for you in the restaurant, where I hope I’ll see you all 55.              . Thank you.

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早期食管癌的临床表现不包括()

A.进食后胸骨后针刺样疼痛

B.进食后胸骨后烧灼感

C.进行性咽下困难

D.食管内异物感

E.X线钡剂显示食管黏膜紊乱

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使用钢尺时应注意什么?

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某仓库最大库容量为50000吨,去年入库物资20000吨,出库物资25000吨,全年直拨量2600吨,年初库存40000吨,全年收发业务580笔,出现差错15笔,总量为300吨,丢失、损坏物资总量为30吨,赔款30000元,业务总收入5000000元,单位物资进出库成本为5元/,单位物资仓储成本为2元/吨。求该库去年物资收发正确率。(提示:物资收发正确率

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由于商业银行管理战略是关于银行一整套中长期发展目标的,所以商业银行管理战略一旦制定以后就不能修改。( )

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