问题
选择题
Jack is the second _____ student in our class. He is _____ than me.[ ]
A. tall; much taller
B. tallest; much taller
C. tall; much more taller
D. tallest; much more taller
答案
答案:B
Jack is the second _____ student in our class. He is _____ than me.[ ]
A. tall; much taller
B. tallest; much taller
C. tall; much more taller
D. tallest; much more taller
答案:B
在一个密闭的容器内,有A、B、C、D四种物质.在电火花作用下充分反应.测
得反应前后各物质的质量如下:
A | B | C | D | |
反应前质量/g | 2 | 5 | 64 | 1 |
反应后质量/g | 2 | 32 | 0 | 未知 |
A.化合反应 B.分解反应