【題目】__________ H7N9 is a deadly virus, it is still safe to eat thoroughly-cooked chicken.

A. Until B. While

C. If D. Since

【答案】B

【解析】句意：盡管H7N9是一種致命的病毒，但吃徹底煮熟的雞仍然是安全的。前后為讓步關(guān)系，用while。

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【題目】C

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A Dutch firm thinks paying for electricity to run the servers and then paying again to cool them is a waste of energy.

Boaz Leupe, CEO of the start-up Nerdalize, says it’s actually quite simple.

"We don't actually have to build the data center, which saves a lot of costs in infrastructure and we don't have the cooling overhead, plus that you have the environmental benefit, that the kilowatt hour you are using is used twice, once to heat the home and once to compute the clients task without the cooling overhead," says Leupe.

The company developed what it calls an e-Radiator, a computer server that also works as an alternative heating source. Leupe says that five Dutch homeowners are experimentally using them in their homes.

“We reimburse the electricity the server uses, and that we can do because of the computer clients on the other side, and, in that way, home owners actually get heating for free, and computer users don't have to pay for the overhead of the data center,” says Leupe.

One of the participants in the year-long experiment, Jan Visser, says the amount of heat produced by e-Radiator depends on the work being done by the server’s processors so it cannot be used as the primary source. But he is ready to try it.

“If it gives good enough warmth, you can use less of your existing central heating, and there is the chance for a home owner to pay less bills.”

Nerdalize says e-Radiators generate temperature of up to 55 degrees Celsius and could save up to $440 in annual heating costs.

【1】Which one is true according to the passage？

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【題目】A

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