What      feel like to lie on the soft beach enjoying the summer sun?

A．do you

B．does it

C．are you

D．is it

骨关节结核的主要感染来源是()

A．经消化道传染

B．经呼吸道传染

C．继发于肠结核

D．继发于肺结核

E．经皮肤直接侵入