问题
选择题
This is ___________ eraser and that’s ____________ gold ring. |
[ ] |
A. a, an B. an, an C. an, a D. a, a |
答案
答案:C
This is ___________ eraser and that’s ____________ gold ring. |
[ ] |
A. a, an B. an, an C. an, a D. a, a |
答案:C
如下图所示装置中,观察到电流计指针偏转,M棒变粗,N棒变细,由此判断下表中所列M、N、P物质,其中可以成立的是
M | N | P | |
A. | 锌 | 铜 | 稀硫酸溶液 |
B. | 铜 | 铁 | 稀盐酸 |
C. | 银 | 锌 | 硝酸银溶液 |
D. | 锌 | 铁 | 硝酸铁溶液 |