能分泌激素的肿瘤是（）。

A.子宫颈癌

B.胶质瘤

C.淋巴瘤

D.黑色素瘤

E.类癌

（）is not a job of the radar antenna.

A.To receive the high-frequency pulses from the transmitter

B.To focus the pulses into a beam，and send them into space

C.To pick up reflected pulses coming from objects that have been struck by the beam

D.To reflect microwaves