用一个10倍的放大镜看一个25度的角，那么看到的仍然是25度的角．
故选：B．
动词运用。
I'm an American boy. I 1______ (come) to China in 2006. I 2______ (study) here for two years. My
father often 3______ (take) me 4______ (play) football on the playground. Last Sunday, I 5______ (take)
to the park by him We saw a lot of monkeys 6______ (jump)in the tree. While I 7______ (walk) along the
rive, I heard a voice from behind. I thought to myself, "It must be Mr. Brown." I was right, it was Mr.Brown,
"Hello, Mr. Brown", I said, "Are you 8______ (take) photos here?" "Yes it's such a beautiful park." My friend
said. China is a great country. We really enjoy 9______ (live) here. Father says we 10______ (travel) back
to America for a short holiday next week.
一个企业长期生产运转的规划涉及很少的品种变化，那么工厂的能力是比较小的，每单位的制造成本是比较低的。
