If you don’t have enough sleep, you will feel __________ in class.

A．sleep

B．sleepy

C．sleeping

D．asleep

中度脱水（）

A.皮肤弹性较差

B.尿量稍减少

C.血压下降，四肢厥冷

D.剧烈口渴

E.脑细胞水肿