The Internet is very useful for us. We can _______ find information we need.
A:easy
B:easily
C:hard
D:hardly
下列运算中,结果正确的是( )
被日本人称为“海上生命线”的海峡是( )
如图所示,上下开口、内壁光滑的铜管P和塑料管Q竖直放置,小磁块先后在两管中从相同高度处由静止释放,并落至底部,则小磁块( )