问题
单项选择题 A型题
目前，国际眼科界公用的棱镜的单位是（）
A.棱镜度
B.度
C.厘弧度
D.偏离角度
E.顶角
答案
参考答案：A
解析：棱镜的单位有4种：棱镜度、厘弧度、偏离角度、顶角。偏离角度、顶角这两种单位已废而不用。目前，国际眼科界公用的单位是棱镜度。
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目前，国际眼科界公用的棱镜的单位是（）
A.棱镜度
B.度
C.厘弧度
D.偏离角度
E.顶角
参考答案：A
解析：棱镜的单位有4种：棱镜度、厘弧度、偏离角度、顶角。偏离角度、顶角这两种单位已废而不用。目前，国际眼科界公用的单位是棱镜度。
Jennie sat at her window as usual, looking out upon the street, with a look of sadness on her face, “What a long day this is going to be!” Then she saw a little boy running down the street, swinging his schoolbag. Looking up to the window, he took off ____11____ hat and bowed with a bright, pleasant smile. “What a nice ____12____,” said Jennie to herself, as the boy ran out of sight. “It seems like having the sunshine. I wish everybody who goes by would look up ____13____ smile. George, the little boy, told his mother about that ____14____ girl when he got back home, “She looks so helpless. I wish I could do something for her.” “Why not give her some ____15____?” said his mother. George agreed. The next morning, as Jennie ____16___ at the window again, she saw George with a handful of beautiful flowers carefully picking his way across the street. He stopped in front of her window, smiling pleasantly, and said, “Can I come in?” Jennie told him _____17____ to get into the house. Opening the door to Jennie’s gentle “Come in”, George said, “I’ve brought you some flowers.” “Are they for me?” said Jennie ____18____. “How kind you are,” she continued, as George put the flowers on her lap. I’ve ____19___ received any flower since we moved to the town.” “Did you live in the countryside?” asked George, ___20____ the old, small and empty room. “Yes,” said Jennie. Jennie used to have a happy family and live in a beautiful house in the countryside. However, she lost her right leg in an accident. She ____21____ walk like other people any longer. Later, her father died, and her mother was sick ___22____ so many years that their money was all gone. They sold the house, and move here to get work to do. George told his parents ____23____. They decided to help her. More and more people in the ____24___ gave Jennie friendly smiles when they passed by her house. She was greatly cheered up. A few months later, Jennie and her mother ____25____ a flower shop. People could always see Jennie sitting in the shop, having a lovely smile on face.
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