题目

下列关于组成细胞化合物的叙述，正确的是（    ） A．蛋白质肽链的盘曲和折叠被解开时，其特定功能并未发生改变 B．胆固醇是构成细胞膜的重要成分之一 C．蔗糖和麦芽糖水解的产物都是葡萄糖 D．脂肪和纤维素是生物体内的能源物质 答案：BI visited my aunt in the countryside near the city last week.          1．        I was surprised to see that great changes had been taken place             2．      in the countryside. Take my aunt’s family for example. We                  3．      supply precious trees and flowers to the store in the city and               4．      have over ten workers working for themselves. Their family’s             5．      income reached as much 100,000 yuan last year Not only                    6．      did they have a house, a car and computers, they can also afford          7．      a trip abroad every year. When asking what else they needed                8．      most, they said that they wanted to learn a few English so that             9．      they could do business with foreigners directly. To their delighted,        10．      my cousin can use that he has learned from university to help them with overseas trade.