丹痧的特征是
A．咳嗽剧烈
B．发热恶寒
C．热退出疹
D．全身布有弥漫性猩红色皮疹
E．手足心见疹为出齐
参考答案：D
Children who are not active or ________ diet is high in fat will gain weight quickly.[ ]
A. what
B. whose
C. which
D. that
产品的成长期是从( )以后开始的．
A．新产品试制成功
B．新产品试销成功
C．产品进入大批量生产
D．产品转入更新换代
