答案：A
She sings __ than any other girl in her class.
A．a lot better
B．a lot more better
C．more a lot better
D．a lot well
多发性息肉的临床症状不包括：（）
A.常伴腹痛腹泻
B.可有粘液血便
C.可伴贫血
D.大便时可脱出肛外
E.可致体重减轻
