问题
单项选择题
合成血红蛋白的基本原料是().
A.铁和叶酸
B.钴和维生素B12
C.蛋白质和内因子
D.铁和蛋白质
E.钴和蛋白质
答案
参考答案:D
合成血红蛋白的基本原料是().
A.铁和叶酸
B.钴和维生素B12
C.蛋白质和内因子
D.铁和蛋白质
E.钴和蛋白质
参考答案:D
Four students are talking about the future after class.
小题1: Maybe will hold the 40th Olympics in 2052. A. Beijing B. Tianjin C. Shanghai 小题2:. thinks that people can spend their holidays on the moon in the future. A. Lin Hong B. Wang Jun C. Li Ping 小题3:. From the talk robots will . A. build new homes B. do what people don’t want to do C. help people discover other planets 小题4:. will be used in many ways in 2050. A. Cloning B. Robots C. Televisions 小题5:. The four students believe in the future . A. it’s difficult to travel far to outer space B. there will be no danger and no air pollution C. life will change for the better |