B
KEY→P19
范畴:人与社会 主题:发明创新 体裁:说明文 难度:★★★★ 建议用时:9分钟 评价: /4
On sunny summer days, everything gets hot. When you sit on a bike seat ... Ouch! Luckily, in many places, bike seats are now wearing silver "coats" to keep cool.
Bicycle seats can get really hot in the sun. When the air temperature is $33\ °\mathrm{C}$, the temperature of seats in the sun can achieve $67.8\ °\mathrm{C}$. This temperature is much higher than the temperature of human skin.
Even with clothes on, touching these seats can hurt. Riding for a long time may put you at risk of getting low-temperature burns.
However, the temperature of these silver seats in the hot sun is only $42$ to $45\ °\mathrm{C}$. Their silver colour takes in much less heat than black, the common colour of bike seats. And they are made from special materials. The materials send more of the heat away. So the seats stay cool.
Other "cool" things:
• Mint
Mint makes your nerves(神经) feel cool, even if the temperature stays the same. When you eat mint or put it on your skin, it tricks you into feeling cooler.
• Cooling patch(清凉贴)
A cooling patch has jelly(胶状物) and water in it. The jelly takes in the heat from your body. This makes you feel more comfortable.
• Cooling spray(清凉喷雾)
A cooling spray sends out very small water drops. They can take in the heat from your skin.
()1. Why do designers make bike seats wear silver "coats"?
A. To help them feel softer.
B. To keep them cooler.
C. To make them look nicer.
D. To make them heavier.
()2. Which word is close in meaning to the underlined word "achieve"?
A. become
B. reach
C. attract
D. produce
()3. Which one is NOT true about other "cool" things?
A. Mint can make your nerves feel cooler.
B. A cooling spray can take in the heat from your skin.
C. There's some water in a cooling patch or a cooling spray.
D. A cooling patch can bring your body more water quickly.
()4. Which can be the best title for this passage?
A. Keeping bike seats and yourself cool
B. Riding bicycles safely on your way
C. Protecting your body and skin well
D. Staying away from high temperatures

本文主要介绍了自行车座的银色“外套”的作用以及三种能让人感到凉爽的东西。
1. B 细节理解题。根据第一段中的“Luckily, in many places, bike seats are now wearing silver ‘coats’ to keep cool.”可知，设计师给自行车座穿上银色“外套”的目的是使其在阳光下保持凉爽。
2. B 词义猜测题。句意：当空气温度为33 ℃时，太阳光下座椅的温度可达到67.8 ℃。achieve意为“达到”，跟reach的意思相近。
3. D 推理判断题。根据倒数第二段内容可知，清凉贴从身体中吸收热量，并不是给你的身体补充更多的水，故D项表述不正确。
4. A 标题概括题。通读全文内容可知，本文介绍了自行车座的银色“外套”，还介绍了薄荷、清凉贴和清凉喷雾这三种让人感觉凉爽的东西。故A项“让自行车座和你自己保持凉爽”为本文的最佳标题。