问题
选择题
— I was told you spoke ill of me in my absence.
— I said it. ______? [ ]
A. How come
B. So what
C. What for
D. Why not
答案
答案:B
— I was told you spoke ill of me in my absence.
— I said it. ______? [ ]
A. How come
B. So what
C. What for
D. Why not
答案:B
(09达州)在一密闭容器中,有甲、乙、丙、丁四种物质,一定条件下充分反应,测得反应前后各物质的质量如下表:
物质 | 甲 | 乙 | 丙 | 丁 |
反应前的质量(g) | 20 | 50 | 80 | 30 |
反应后的质量(g) | 0 | 100 | 10 | x |
请根据质量守恒定律判断x的值
A.50 B.40 C.10 D.70