— Daddy, I can see only a few stars in the sky.

— Oh, my son. Many of stars ____ because they are too far away from us.[ ]

A．may not see

B．can not be seen

C．mustn't be seen

D．needn't see

慢性肾小球肾炎的临床表现是

A．血尿、高血压、蛋白尿、水肿

B．尿频、尿急、尿痛

C．肾区叩击痛

D．高血压、低蛋白血症

E．排尿异常