问题
选择题
下列投影是平行投影的是[ ]
A.太阳光下窗户的影子
B.台灯下书本的影子
C.在手电筒照射下纸片的影子
D.路灯下行人的影子
答案
答案:A
下列投影是平行投影的是[ ]
A.太阳光下窗户的影子
B.台灯下书本的影子
C.在手电筒照射下纸片的影子
D.路灯下行人的影子
答案:A
根据短文内容,用方框里所给词的适当形式填空。 | |
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One day, the great French scientist Andre Marie Ampere went on his way to give a lecture. He was thinking about an 1 as he was going along a river. He 2 a stone and put it into his pocket. Suddenly he thought out a way to 3 his experiment. He was so 4 that he threw what he thought was a "stone" in his pocket 5 the river. Later when he wanted to look at the 6 , he searched his pocket for the watch. But what he finally 7 out from his pocket was not a watch but the stone. |