Several theories of evolution had historically preceded that of Charles Darwin, although he expounded upon the stages of development.

A．found fault with

B．explained in detail

C．outlined briefly

D．offered in published form

直接刺激黄体分泌孕酮的激素是

A．褪黑素

B．卵泡刺激素

C．黄体生成素

D．促甲状腺激素

E．促肾上腺皮质激素