西瓜味甜多汁,原因是西瓜中含有大量的糖和水,这汁液主要是存在于西瓜细胞的[ ]
A.细胞壁
B.细胞膜
C.细胞核
D.液泡
答案:D
患儿咳嗽频作,喉痒声重,痰白稀薄,鼻塞流涕。其病机是
A.风寒犯肺
B.风热犯肺
C.痰热内盛
D.痰湿内停
E.肺脾气虚
—Would you like __________noodles?
—No, thanks. [ ]
A. some
B. any
C. much
D. a little