【单选题】Why do people prefer to buy food or daily necessities in grocery stores or supermarkets?
A.
Because things there are in great variety.
B.
Because the prices there are higher.
C.
Because of the after-sale service.
D.
Because they are often nearer.
【单选题】M: Do people prefer fast food? W: I suppose so. As modern people are living a faster-paced life, fast food has become very popular. 21. Why do people prefer fast food according to the woman?
【判断题】蛋白质主要由碳、氢、氧、氮四种元素组成,其中氮元素的平均含量约为16%。
【单选题】Why do people prefer to eat lunch at the mountain restaurants?
A.
Because food is normally much better there.
B.
Because it is much more convenient.
C.
Because the atmosphere is normally much nicer there.
D.
Because it is normally much cheaper.
【单选题】有关人体的组成元素的说法中错误的是( )
B.
人体内的碳、氢、氧、氮四种元素主要以水、糖类、油脂、蛋白质和维生素形式存在
D.
由于微量元素的含量非常少,因此,对人体健康的影响也很小