图示电路中，A点和B点的电位分别是： 
A:-2V，1V B:2V，1V C:2V，-1V D:1V，2V
1891年产生的“谢尔曼法”实际上是限制垄断、保护竞争。
排球运动起源于1891年。
1889年法国的别儒研制成功了（）和（）；1891年（）在法国开发成功；1891年法国首先采用了前置发动机（）驱动。
差速器；齿轮变速器；摩擦片式离合器；后轮
1891年，世界上第一条（）千伏输电线路建成使用。
1891年______成为中国最早对外开埠的内陆通商口岸。
1891年标志着电机发展新阶段开始的是在电能实际应用中首次采用( )。
A:二相异步电动机 B:三相异步电动机 C:三相变压器 D:三相制
Passage 2
Basketball is a sport enjoyed by
millions of fans in at least 100 countries. It’s one of the best-known sports in
the world. It all began in 1891.
Dr. James A. Naismith, the
father of basketball, was an instructor at a YMCA(jī dū jiāo ) Training school. The
school trained people to work in YMCAs. Officials at the school were
concerned about the low attendance during the winter months. They felt that
people didn’t attend then because the school did not have a good winter sports
program. So they asked Dr. Naismith for help. He came up with a new indoor
game.
Naismith studied current games. He found that all the most
popular games used a ball. So a ball would be a part of his new game, he
decided. But kicking the ball or hitting it would be too rough for indoor. So he
put 2 peach baskets up on poles. The players had to try to throw a soccer ball
into them. Naismith then made thirteen rules for the game. 12 of them are still
in use today. Just 7 years after the game began, professional basketball teams
were formed.
And that’s how basketball was
born. |
First basketball teams were formed ______.
A:around 1898 B:in 1891 C:at the time when YMCA was established D:when Naismith came to the YMCA training school
单项选择题
