反射面是______，一束平行光照射到反射面上，会把平行的入射光线_爱下问搜题

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问题填空题

反射面是______，一束平行光照射到反射面上，会把平行的入射光线向着______反射，这种反射叫漫反射．

答案

反射面是凹凸不平的，一束平行光射到反射面上，反射光线不再平行，而是射向各个方向，这种反射叫做漫反射．

故答案为：凹凸不平；各个方向．

完形填空

Checks have largely taken the place of money as a means of 36 , for they are widely accepted everywhere. 37 this is very 38 for both buyer and seller, it should not be forgotten that checks are not real money: they are quite 39 in themselves. A shop-keeper runs a certain 40 when he accepts a check and he is quite 41 his rights if, on occasion, he 42 to do so. People do not always know this and are 43 if their good faith is called in question. A wealthy friend of mine told me he had an extremely 44 experience.
One day he decided to buy a particularly fine pearl necklace at a famous jewelry shop which keeps a large__45 of precious stones and asked if he could pay 46 check, the assistant said that this was quite 47 . But the moment my friend signed his name, he was invited into the manager’s office. The manager was very polite, but he explained that someone 48 exactly the same name had presented them with a worthless check not long ago. My friend got very angry at it and said he would buy a necklace 49 . When he got up to go, the manager told him that the police would arrive at any moment and he had better stay 50 he wanted to get into serious trouble. Sure enough the police arrived, __51 to my friend for the 52 , but explained that a person who had used the same name as his 53 for a number of recent robberies. Then the police asked my friend to 54 out a note which had been used by the thief in a number of shops. The note read, “I have a gun in my pocket, ask no questions and give all the money in the safe.” Fortunately, my friend’s handwriting was quite__55__ the thief’s. He was not only allowed to go without further delay, but to take the pearl necklace with him.

C．unimportant

C．opportunity

A．uninteresting

B．unreasonable

C．unforgettable

C．somewhere else

C．apologizing

C．inconvenience

A．responsible

填空题

孕晚期（）每隔（）产前检查一次，（）后，（）检查一次。