在常温常压下，可可脂的熔点温度是______。A．15～180℃ B．23～25℃

一般病菌多在室温环境生长繁殖，低温环境停止生长，仅能维持生命。而耶尔森氏菌却恰恰相反，不但不怕低温寒冷，而且只有在0℃左右才大量繁殖。冰箱里存储的食物，使耶尔森氏菌处于最佳生长状态。

由此可以推出（）。

A．耶尔森氏菌在室温环境无法生存

B．一般病菌生长的环境也适合耶尔森氏菌生长

C．耶尔森氏菌的最佳生长温度不适合一般病菌

D．0℃环境下，冰箱里仅存在耶尔森氏菌

A person has to be sixteen to drive, seventeen to see certain movies, and eighteen to vote. People can get terrific discounts on all sorts of stuff－provided they’re over sixty-five. Everywhere we look there are age limits that define what people can and can’t do. But creativity has no boundaries, no limitations. Anyone can invent. And they do. Inventors are popping up at the youngest ages.

Sitting in the car waiting for her mom to return from shopping, Becky decided she might as well try to finish her math homework. But it was growing dark and getting hard to see the paper.

“I didn’t have a flashlight, and I didn’t want to open the car door because then the whole car would light up.” recalled Becky. “So I thought it would be neat to have my paper light up somehow, and that’s when the idea came to me.”

It isn’t every day that a ten-year-old invents a product eagerly sought by several businesses, but that’s exactly what Becky Schroeder did when she created a tool that enabled people to write in the dark. Her invention? The Glo-sheet.

That night Becky went home, trying to imagine different ways of making her paper glow in the dark. She remembered all sorts of glow-in-the-dark toys－like balls and Frisbees－and wondered how they were made. She was determined to find a solution. So they very next day, Beck’s dad took her on an outing to the hardware store. They returned with a pail (桶) of phosphorescent paint. She took the paint and stacks of paper into the darkest room in the house－the bathroom. There, she experimented.

“I’d turn on the light, turn it off, turn it on,” said Becky. “My parents remember me running out the room saying ‘It works, it works! I’m writing in the dark!’ ”

She used an acrylic board and coated it with a specific amount of phosphorescent paint. She took a complicated idea and made it work rather simply. When the coated clipboard is exposed to light, it glows. The glowing board then illuminates or lights up the paper that has been placed on top. Two years after her initial inspiration, in 1974, Becky became the youngest female ever to receive a U.S. patent.

She didn’t actively market her Glo-sheet. She didn’t need to. The New York Times wrote an article about an incredible invention－patented by a twelve-year-old, and the inquiries and orders streamed in.

小题1:From Paragraph 1 , we can draw a conclusion that _________.

A．it is illegal for one to drive under sixteen

B．people enjoy privileges when over sixty-five

C．one is never too old or too young to invent

D．people hate the limitations that define our behavior小题2:What caused Becky to invent Glo-sheet?

A．She was trying to do homework when it got dark.

B．She was having trouble with math problems.

C．She was trying to earn some money.

D．She was working on a school project.小题3:What is the meaning of the underlined words “phosphorescent paint” in paragraph 5?

A．paint that acts as a glue

B．paint that covers a mark

C．paint that becomes hard

D．paint that glows in the dark小题4:What does it mean that Beck “didn’t actively market her Glo-sheet” according to paragraph 8?

A．She kept the original one for her own use.

B．Other people came to her for the Glo-sheet.

C．Becky’s father tried to sell the Glo-sheet.

D．She gave away patent to the government.小题5:With which statement would Becky most likely agree?

A．Experience is needed to be a good inventor.

B．Only by inventing things can you know what people need.

C．Always try to sell patent rights to large companies.

D．You never know what you can do unless you try.

( )是一类社会危害性非常严重的犯罪，是《刑法》分则规定的犯罪中除危害国家安全罪外，客观危险性最大的一类罪。

A．教育设施重大安全罪

B．谎报安全事故罪

C．危害公共安全罪

D．交通肇事罪

冷却水含油量一般不大于（）mg／l。

A.8

B.7

C.6

D.5

漏斗、漏咀堵塞的原因之一是（）。