火灾扑灭后，必须仔细检查，消消灭余烬，以防死灰复燃，必要时派专人看守火场.
参考答案：对
My 15-day-old brother is not _______ to drink water by himself.
A．enough old
B．old enough
C．too young
D．young too
结肠小袋纤毛虫主要临床症状有（）。
A.咳嗽
B.血尿
C.肠梗阻
D.脾脓肿
E.腹泻和粘液血便
