—Oh, I couldn't feel any . I hardly understood most of the questions they asked.
A:happier
B:better
C:worse
D:harder
一个数的相反数是3,则这个数是( )
- What's your favourite _______?( )
- Cat.
在三棱柱ABC﹣A1B1C1中,侧棱AA1⊥平面AB1C1,AA1=1,底面△ABC是边长为2的正三角形,则此三棱柱的体积为____