题目

正五边形绕着它的中心旋转后与它本身重合，最小的旋转角度数是（ ）A. 36° B. 54° C. 72° D. 108° 答案：【答案】C【解析】分析：根据旋转的定义，最小旋转角即为正五边形的中心角．详解：正五边形绕着它的中心旋转后与它本身重合，最小的旋转角度数是=72度．故选：C． 完形填空 　　It was Monday．Mrs Smith's dog was 　　1　　, but there was no meat in the house． 　　Thinking that there was no 　　2　　 way, Mrs Smith took a piece of paper, and wrote the following words on it：“Give my dog half a pound of meat．”Then she gave the paper to her dog and said,“　　3　　 this to the butcher, and he's going to give you your lunch today．”　　4　　 the piece of paper in its mouth, the dog ran to the butcher's shop．It gave the paper to the butcher．The butcher read it 　　5　　, and recognized(辨认)that it was 　　6　　 Mrs Smith's handwriting．So he did 　　7　　 he was asked to．The dog was very happy, and ate the meat up at once． 　　At midday, the dog came to the shop again．It gave the butcher a piece of paper again．After reading it, he gave half a pound of meat 　　8　　． 　　The next day, the dog came again just at midday．And as usual, it brought a piece of paper in the mouth．This time, the butcher did not take a look at the paper, and gave the dog 　　9　　 meat, for he had regarded the dog as one of his customers．But, the dog came again at 4∶00 p. m．And the same thing happened once again．To the butcher's surprise, it came for the third time at 6∶00 p. m．The butcher felt puzzled．He said to himself,“this is a small dog．Why does Mrs Smith give it so much meat to eat today?”Looking 　　10　　 the piece of paper, he found that there were no words there． (1) [　　] A． hungry B． thirsty C． hot D． ill (2) [　　] A． another B． other C． others D． the other (3) [　　] A． take B． bring C． get D． carry (4) [　　] A． Picking B． Having C． Dropping D． Holding (5) [　　] A． carefully B． quietly C． slowly D． clearly (6) [　　] A． possibly B． really C． exactly D． strongly (7) [　　] A． when B． like C． as D． after (8) [　　] A． too B． also C． again D． either (9) [　　] A． its B． his C． himself D． it (10) [　　] A． at B． for C． into D． up