A:钙片和生长激素
B:钙片和维生素D
C:葡萄糖和胰岛素
D:甲状腺激素和胰岛素
人们通常用钨这种金属制造电灯的灯丝,是因为钨的____高。
Last year, some groups of students in their community (社区) made a survey about "How do people spend their free time?" The following diagrams show some results of it:Diagram (1): Hours for people of different ages who surf the Internet in a week.Diagram (2): Different days people go to the library. (library attendance)Diagram (3): Different programs people like.根据上面三个图表内容,选择正确答案。