问题
选择题
下列能为人体提供能量的营养物质中，属于高分子化合物的是
A．蔗糖
B．油脂
C．葡萄糖
D．蛋白质
答案
答案：D
题目分析：蛋白质属于高分子化合物，其余都不是的，答案选D。
点评：常见的天然高分子化合物是淀粉、纤维素和蛋白质，需要熟练记住。
搜题请搜索小程序“爱下问搜题”
下列能为人体提供能量的营养物质中，属于高分子化合物的是
A．蔗糖
B．油脂
C．葡萄糖
D．蛋白质
答案：D
题目分析：蛋白质属于高分子化合物，其余都不是的，答案选D。
点评：常见的天然高分子化合物是淀粉、纤维素和蛋白质，需要熟练记住。
Jim Green works in the hospital. Last weekend he __41___ go to work. On Saturday morning his father ___42__ to him, “Jim, go to the city and to see my best friend, Mr Vickers. Here is his 43 . His home is near the station.” Jim went to the city __44__ train. He got off (下车) the train and thought, “Mr Vicker’s 45 is near the station, I can __46 _ it easily.” But after an hour he couldn’t find it. 47 he stopped and asked an old man. The old man said, “Just go along this street, __48__left at New Zoo, and the house is __49__ your right.” Three weeks 50 , his father told him __51__ Mr Vickers again. He had to __52__ someone for the way when he didn’t find the house. He stopped the 53 man. He was _54_ and said, “Are you still __55__ that place, young man?”
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