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The world's fastest high-speed train
世界上最快的高铁（宿迁宿城改编）
主题：人与社会/科学技术 难度星级：★★★★☆ 用时：/8分钟 KEY→D31
The world’s first steam train（蒸汽机车）ran in the UK in 1825. It went 24 km an hour. Today, China’s CR450 high-speed train wows the world. It runs up to 450 km an hour in tests（测试）. This makes it the world’s fastest high-speed train.
How can a train run so fast? “It must be ‘thin’ and strong,” said Chen Can, an engineer（工程师）of the train. To help the train “lose weight”, engineers use special materials, such as carbon fiber. The material is strong and light. This cuts the train’s weight by 10 per cent.
Also, engineers give the train’s nose a new look. Now, CR450’s nose is just like an arrow（箭）. This way, the train runs through the air more easily.
词汇积累
carbon fiber 碳纤维 per cent 百分之
Read and choose. 根据文章内容，选择最佳答案。
（
A. In the UK. B. In the US. C. In the PRC.
（数字计算 How many times faster（快多少倍）is CR450 than the world’s first steam train in tests?
A. About 10 times. B. About 18 times. C. About 50 times.
（
① It carries fewer passengers（乘客）.
② It uses special material.
③ Its nose is thinner and longer.
A. ①② B. ②③ C. ①③
（
A. make it heavy
B. use light materials
C. use old materials to make it strong
世界上最快的高铁（宿迁宿城改编）
主题：人与社会/科学技术 难度星级：★★★★☆ 用时：/8分钟 KEY→D31
The world’s first steam train（蒸汽机车）ran in the UK in 1825. It went 24 km an hour. Today, China’s CR450 high-speed train wows the world. It runs up to 450 km an hour in tests（测试）. This makes it the world’s fastest high-speed train.
How can a train run so fast? “It must be ‘thin’ and strong,” said Chen Can, an engineer（工程师）of the train. To help the train “lose weight”, engineers use special materials, such as carbon fiber. The material is strong and light. This cuts the train’s weight by 10 per cent.
Also, engineers give the train’s nose a new look. Now, CR450’s nose is just like an arrow（箭）. This way, the train runs through the air more easily.
词汇积累
carbon fiber 碳纤维 per cent 百分之
Read and choose. 根据文章内容，选择最佳答案。
（
A
）1. Where did the first steam train run in 1825?A. In the UK. B. In the US. C. In the PRC.
（
B
）2. A. About 10 times. B. About 18 times. C. About 50 times.
（
B
）3. Why is CR450 faster than old trains?① It carries fewer passengers（乘客）.
② It uses special material.
③ Its nose is thinner and longer.
A. ①② B. ②③ C. ①③
（
B
）4. To make a faster bike, an engineer could according to this passage.A. make it heavy
B. use light materials
C. use old materials to make it strong
答案
[答案与解析] 1. A 2. B 3. B 解析由“To help the train 'lose weight', engineers use special materials, such as carbon fiber.”及“Now, CR450's nose is just like an arrow. This way, the train runs through the air more easily.”可知,CR450更快的原因是使用了特殊材料及像箭一样又细又长的车头。 4. B
