M: Oh, so when the weather was humid, it weighed more. And when it was dry, it weighed less.
W: Exactly. And that variation can affect the standards of the whole country. So our department had the new weight made out of higher quality metal.
M: How much did it cost?
W: About forty-five thousand dollars.
M: Forty-five thousand dollars! For a one kilogram weight! That’s more expensive than gold. Is it really worth that much?
W: I’m sure it is. Industries depend on our government agency to monitor the accuracy of scales, so that when they buy and sell their products there’s one standard. Think of the drug industry, for example: those companies rely on high accuracy scales to manufacture and package medicine.
Questions 19 to 21 are based on the conversation you have just heard.
19. What is the conversation mainly about?
【解析】選[A]。選項(xiàng)都是一些總結(jié)性的詞句表明該題可能就對(duì)話的主旨或大意提問(wèn)。由對(duì)話開(kāi)頭就提到的some questions about the new official standard weight that you purchased可判斷該對(duì)話是圍繞“新的標(biāo)準(zhǔn)測(cè)重砝碼”展開(kāi)的，故選[A]。[B]和[C]都是針對(duì)對(duì)話中it was made of poor quality metal that was too porous — it absorbed too much moisture設(shè)的干擾項(xiàng)。[D]在對(duì)話中沒(méi)有涉及。
20. How is the weight used?
【解析】選[B]。選項(xiàng)表明該題可能考查某一個(gè)事物的用途或作用。[C]中的atmosphere與選項(xiàng)中多次提到的scale，metal，weight等詞關(guān)系不大，故可初步排除。由對(duì)話中Dr. Thomas的回答... use it to check the scales all over the country可直接得出答案是[B]。[D]是根據(jù)對(duì)話中的higher quality metal設(shè)的干擾項(xiàng)。
W: Exactly. And that variation can affect the standards of the whole country. So our department had the new weight made out of higher quality metal.
M: How much did it cost?
W: About forty-five thousand dollars.
M: Forty-five thousand dollars! For a one kilogram weight! That’s more expensive than gold. Is it really worth that much?
W: I’m sure it is. Industries depend on our government agency to monitor the accuracy of scales, so that when they buy and sell their products there’s one standard. Think of the drug industry, for example: those companies rely on high accuracy scales to manufacture and package medicine.
Questions 19 to 21 are based on the conversation you have just heard.
19. What is the conversation mainly about?
【解析】選[A]。選項(xiàng)都是一些總結(jié)性的詞句表明該題可能就對(duì)話的主旨或大意提問(wèn)。由對(duì)話開(kāi)頭就提到的some questions about the new official standard weight that you purchased可判斷該對(duì)話是圍繞“新的標(biāo)準(zhǔn)測(cè)重砝碼”展開(kāi)的，故選[A]。[B]和[C]都是針對(duì)對(duì)話中it was made of poor quality metal that was too porous — it absorbed too much moisture設(shè)的干擾項(xiàng)。[D]在對(duì)話中沒(méi)有涉及。
20. How is the weight used?
【解析】選[B]。選項(xiàng)表明該題可能考查某一個(gè)事物的用途或作用。[C]中的atmosphere與選項(xiàng)中多次提到的scale，metal，weight等詞關(guān)系不大，故可初步排除。由對(duì)話中Dr. Thomas的回答... use it to check the scales all over the country可直接得出答案是[B]。[D]是根據(jù)對(duì)話中的higher quality metal設(shè)的干擾項(xiàng)。