A:I called you yesterday. You didn't answer it. B:Oh, sorry. I_ in the bathroom at that time.
A:was taking a shower
B:took a shower
C:take a shower
地面某一个地点高出海平面的垂直距离叫做____.
第一组
He -268.8
(a) -249.5
Ar -185.8
Kr -151.7
第二组
F2 -187.0
Cl2 -33.6
(b) 58.7
I2 184.0
第三组
(c) 19.4
HCl -84.0
HBr -67.0
HI -35.3
第四组
H2O 100.0
H2S -60.2
(d) 42.0
H2Te -1.8
下列各项判断正确的是( )