①Do you know why Jenny ran ____ out of the room?

②The baby is too young to look after____.

③I got up too early and  I'm feeling very ____ now.

④My brother ____ his leg when he fell off the bike.

⑤This flower sends out one kind sweet ____.

在8的后面添上一个零，这个数比原数多____，这个数比原数多____倍．

cos（$\frac{3\mathrm{\pi }}{2}$﹣φ）=$\frac{3}{5}$，且|φ|＜$\frac{\mathrm{\pi }}{2}$，则tanφ为（　　）