日常生活中，我们经常接触到“高钙奶粉”、“补锌糖浆”、某牌号_爱下问搜题

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问题选择题

日常生活中，我们经常接触到“高钙奶粉”、“补锌糖浆”、某牌号的雀巢奶粉因碘含量超标，曾轰动全国．这里的钙、锌、碘是指（　　）

A．单质

B．氧化物

C．分子

D．元素

答案

“高钙奶粉”、“补锌糖浆”、某牌号的雀巢奶粉因碘含量超标，这里的“钙、锌、碘”等不能以单质、氧化物、分子、原子等形式存在，这里所指的“钙、锌、碘”是强调存在的元素，与具体形态无关．

故选D．

填空题

（）个十和（）个一组成75。

完形填空

Basketball is a sport enjoyed by millions of people in at least 100 countries. It’s one of the 26 sports in the world. It began in 1891.
Dr. James A. Naismith, the father of basketball, was a teacher of YMCA training school. It trained the people to work in YMCAs. Officials at the school were 27 about the low attendance during the 28 months. They 29 that people didn’t attend then 30 the school did not have a good sports program in winter. So they asked Dr. Naismith for 31 . He came up with a new indoor game.
Naismith studied games being played at that time. He found that all the most 32 games used a ball. So a ball would be part of his new game, he decided. But 33 the ball or hitting it would be too 34 for indoors. So he put two 35 up on the poles. The players had to try to 36 a ball into them. Naismith then made thirteen 37 for the game. Twelve of them are still in 38 today. Just seven 39 after the game began professional basketball teams were 40 . And that’s how basketball was born.

A．most beautiful

B．most useful

C．most necessary