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问题 单项选择题

分馏塔有缩径是（）

A、便于安装

B、减少塔内停留时间，减少结焦

C、节约钢材

答案

参考答案：B

阅读理解
根据课文内容，完成下列表格，每空词数不限。
Information about basketball
In China, basketball (1)                         by many, for fun and exercise.
basketball was invented by James Naismith who was a (2)                          . 
The first basketball game in history was played on Dec.21st, (3)                        .
In 1936 in Berlin, basketball game became an (4)                         .
now basketball has become a more (5)                           sport for people to watch worldwide.
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单项选择题

氢气孔在焊缝表面上看呈（）形，气孔的四周有光滑的内壁。

A.喇叭口形

B.条虫状

C.蜂窝状

D.水滴状
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