累及全身的双侧严重无力或不协调的患者适用（）
A.腋杖
B.四足手杖
C.前臂支撑拐
D.肘杖
E.以上均不正确
参考答案：D
Those successful deaf dancers think that dancing is an activity ________ sight matters more than hearing.
A．when
B．that
C．which
D．where
由化学物品引起的火灾，能用水灭火的物质是( )
A．金属钠
B．五氧化二磷
C．过氧化物
D．三氧化二铝
