—_______ is the weather in New York?
—It's very cold, because it just snowed yesterday.
A：How
B：What
C：Where
D：Why
钩码重G/N
0.5
1
1.5
2
2.5
3
3.5
弹簧伸长量x/cm
4
6
8
10
12
14
弹力F/N
电容的单位是（ ）
2Hg（l）+O2（g）=2HgO（s）；△H=﹣181.6kJ•mol﹣1
则反应Zn（s）+HgO（s）=ZnO（s）+Hg（l）的△H为（ ）
