阅读理解。
I was telling my boy Sonny the story of the hare ( 兔子) and the tortoise ( 乌龟 ). At the end I said, " Son, remember: Be slow and steady ( 镇定的), and that will win the race. Don't you think there's
something to learn from the tortoise?"
Sonny opened his eyes wide, " Do you mean next time when I'm entering for the 60-metre race I
should wish that Billy, Tony and Sandy would all fall asleep halfway?"
I was shocked, "But the tortoise didn't wish that the hare would fall asleep!"
"He must have wished that," Sonny said, "Otherwise how could he be so foolish as to race with the
hare? He knew very well the hare ran a hundred times faster than he himself did."
"He didn't have such a wish," I insisted. "He won the race by perseverance ( 坚忍不拔的 ), by
pushing on steadily."
Sonny thought a while. "That's a lie," he said. " He won it because he was lucky. If the hare hadn't
happened to fall asleep, the tortoise would never have won the race. He could be as steady as you like,
or a hundred times steadier, but he'd never have won the race. That's for sure."
I gave up. Today's children are not like what we used to be. They're just hopeless.
1. The writer argued ( 辩论 )with his son because ______.
A. he liked tortoises while his son liked hares
B. they disagreed about whether the tortoise was foolish
C. he tried to teach his son a moral (品德)lesson but the son had totally different opinion
D. he liked the story of the hare and the tortoise while his son didn't.
2. Sonny believed that the tortoise ________.
A. won the race by his own hard working
B. took a risk ( 冒险 )by agreeing to run a race
C. was not given a fair chance in the race
D. in fact did win the race luckily
3. Billy, Tony and Sandy must be________.
A. boys who were unknown to Sonny's father
B. boys who Sonny has run races with before
C. boys who Sonny has never raced with before
D. boys who Sonny did not expect to race with again
4. The writer thinks that his generation ( 一代人 )________.
A. are cleverer than Sonny's generation
B. have the same ideas about life as Sonny's generation
C. are more hopeful than Sonny's generation
D. have different ideas about life from Sonny's generation
5. According to the passage, who do you think learnt a lesson?
A. The tortoise
B. Sonny
C. The hare
D. Sonny's father
透明圆柱体放置在水平面上，一束蓝光从A点沿水平方向垂直于左表面射入圆柱体后经B点射出，最后射到水平面上的C点。已知OA＝
，该圆柱体对蓝光的折射率为
，则它从右侧面射出时的出射角β＝________；若将蓝光换成紫光，则它从圆柱体射出后落到水平面上形成的光点与C点相比，位置________(选填“偏左”、“偏右”或“不变”)。