在Rt△ABC中，∠C=90 °，∠A=30 °，则tanA+tanB=( )
With smart phones taking the world by ____ storm, a phone that can only send and receive voice calls and text messages may seem like ____ relic.
A．a; a
B．the; 不填
C．the；a
D．不填; a
小儿添加淀粉类食物的年龄是（）。
A.1个月
B.2个月
C.3个月
D.4个月
E.8个月
