The weather is fine. What about ____ outside.

A．have a walk

B．to have a walk

C．having a walk

D．has a walk

杜仲药材中的降压成分是（）

A.松脂醇二葡萄糖苷

B.白桦脂醇

C.杜仲胶

D.桃叶珊瑚苷

E.β-谷甾醇