We were all        to receive your letter and had read it     delight.

A．delight, in

B．delighting, in

C．delighting, with

D．delighted, with

一般来说，收缩压主要反映（）

A.心脏、血管的功能

B.动脉管壁的弹性

C.外周阻力的大小

D.心脏每搏输出量的大小