职工当班必须穿戴好劳动保护用品，做到“（）”。

患者，男性，60岁。患急性前壁心肌梗死。发病第2天突然出现短暂意识丧失、抽搐。心电图上最可能出现的心律失常是（）

A.心房颤动

B.房性期前收缩

C.房室传导阻滞

D.室性期前收缩

E.窦性心律不齐

Sunny countries are often poor. A shame, then, that solar power is still quite expensive. Eight19, a British company by Cambridge University, has, however, invented a novel way to get round this. In return for a deposit of around $10 it is supplying poor Kenyan families with a solar cell able to generate 2.5 watts of electricity, a battery that can deliver a three amp（安培） current to store this electricity, and a lamp whose bulb is a light-emitting diode（二极管）. The firm thinks that this system, once the battery is fully charged, is enough to light two small rooms and to power a mobile-phone charger for seven hours. Then, next day, it can be put outside and charged back up again.

The trick is that, to be able to use the electricity, the system's keeper must buy a scratch card—for as little as a dollar—on which is printed a reference number. The keeper sends this reference, plus the serial number of the household solar unit, by SMS to Eight19. The company's server will respond automatically with an access code to the unit. 

Users may consider that they are paying an hourly rate for their electricity. In fact, they are paying off the cost of the unit. After buying around $80 worth of scratch cards—which Eight19 expects would take the average family around 18 months—the user will own it. He will then have the option of continuing to use it for nothing, or of trading it in for a bigger one, perhaps driven by a 10-watt solar cell. 

In that case, he would go then through the same process again, paying off the additional cost of the upgraded kit at a slightly higher rate. Users would therefore increase their electricity supply steadily and affordably.

According to Eight19's figures, this looks like a good deal for customers. The firm believes the average energy-starved Kenyan spends around $10 a month on oil—enough to fuel a couple of smoky lamps—plus $2 on charging his mobile phone in the market-place. Regular users of one of Eight19's basic solar units will spend around half that, before owning it completely. Meanwhile, as the cost of solar technology falls, it should get even cheaper.

小题1:The underlined word “get round” in the first paragraph can be replaced by _______ .

A．make use of

B．come up with

C．look into

D．deal with小题2:What should the user do when the electricity in the battery is used up?

A．Buy a scratch card.

B．Recharge it outside.

C．Buy another solar cell.

D．Return it to the company.小题3:How much would users pay for the cell and scratch cards before they own a 2.5-watt solar cell?

A．Around $10.

B．Around $80.

C．Around $90.

D．Around $180.小题4:It can be inferred from the last paragraph that  ____________.

A．Kenyan families would find it difficult to afford the solar cell

B．using the solar cell would help Kenyan families save money

C．few Kenyan families use mobile phones for lack of electricity

D．the company will make a great profit from selling solar cells小题5:What might be the most suitable title for the passage?

A．Solar Energy: Starting from Scratch.

B．Eight19: a creative British Company.

C．Kenyan Families: Using Solar Energy for Free.

D．Poor Countries: Beginning to Use Solar Energy.

2010年6月，甲公司与乙公司签订了合同，由甲公司向乙公司销售一批货物并由甲公司负责运输。合同的金额为500万元，其中包括货款和货物运输费用。根据印花税法律制度的规定，购销合同的印花税税率为0.3‰，运输合同的印花税税率为0.5‰。那么甲公司应纳的印花税为( )万元。

A．0.06
B．0.09
C．0.25
D．0.24

确定油与藏形成的时间和方法主要有哪些？

螺杆钻具的工作原理是什么？