Many gases        in the atmosphere actually        heat energy that escapes from the Earth’s surface back to the earth.

A．finding; reflecting

B．found; reflected

C．found; to reflect

D．found; reflect

畸胎类肿瘤描述错误的是（）

A.多位于前纵隔中部

B.分囊性和实质性两种

C.含有骨骼、牙齿是其特征

D.短期内增大示其恶性变

E.不能见到气液平面