夜晚的剧场，一舞蹈演员身穿蓝色毛衣、白色裤子表演，当红色聚光_爱下问搜题

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问题填空题

夜晚的剧场，一舞蹈演员身穿蓝色毛衣、白色裤子表演，当红色聚光灯投射到演员身上时，观众看到演员的毛衣颜色为色，裤子是色。当灯光射向演员，观众就能看见她，是因为灯光在演员身上发生了。

答案

黑，红，反射（漫反射）

红光照在蓝色毛衣上，蓝色毛衣不能反射红光，只能反射蓝光，没有光线进入观众的眼中，观众看到演员的毛衣就是黑色的；裤子反射红光，显红色；我们能够看到不发光的演员就是因为演员反射照向它的红光，进入我们的眼中，所以我们就看见了演员．

多项选择题

血浆胶体渗透压降低可引起的变化有（）

A.血容量增多

B.有效滤过压增高

C.细胞内液减少

D.组织液容量增多

E.进入毛细血管的水分减少

完形填空

Last Friday my brother and I were driving home and had a fun conversation. So absorbed in our talk, my brother took a wrong turn.
Unfortunately, the wrong turn took us towards a 31 , and we had no way to turn 32 . __33 my brother paid the bridge fee and drove on. He was greatly 34 by his mistake and the needless   35  of $4.
We eventually reached an exit, and as we took it, my brother noticed a young fellow 36 over to the side. He came out of his car and tried to 37 someone. I was busy trying to   38 which way we would go next, but my brother stopped and asked the guy if he needed any 39 And he did. He had a flat tire and needed a tool to get it off.
My brother gave him a wrench（扳手）, and then helped him 40 the flat. The young man said that this had been a 41 week for him: earlier he had gotten into a minor car 42 , and now this tire was flat on his way home from work. But he called us “a breath of fresh air’’ and kept   43  us because he really would have been   44  if we hadn’t come along.
After we had finished the job, he thanked us again and pulled out $20 to give us. “No,” my brother said. “We were never 45 to even get on that bridge. We took a wrong turn. But now we know 46  we did. It was to help you. Thank you for turning our mistake into a（n） 47 to serve.”
What I loved most was 48 my brother throughout this process. He was able to turn his mistake into 49 energy to help others even in a negative situation, which could only come from a calm mind and an open 50 .

C．Unwillingly

A．put forward

A．encouraging

C．opportunity