How beautifully she sings! I have never heard________.

A．the better voice

B．a good voice

C．the best voice

D．a better voice

水痘的临床特征是（）

A.好发于年长儿

B.好发于夏、秋季

C.丘疹、疱疹、结痂并存

D.疱疹壁较薄，易破溃

E.皮疹多分布在头、手部，躯干部少