A:保持S不变,增大d,则θ变大
B:保持S不变,增大d,则θ变小
C:保持d不变,减小S,则θ变小
D:保持d不变,减小S,则θ不变
如图是失去标签的无色溶液,你认为它可能是( )
交通标志引领我们安全出行。对下列交通标志认识正确的是( )
The Internet is very useful. We can get a lot of __________ from it.