许多易燃固体严禁与酸、氧化剂接触，因为具有（）的危险特性。
参考答案：遇酸、氧化剂易燃易 爆
重度贫血的血红蛋白浓度是（）
A.<30g/L
B.30～59glL
C.60～89g/L
D.90～100g/L
E.>100g/L
What are you doing out of bed, Tom? You're ________ to be asleep.[ ]
A. supposed
B. known
C. thought
D. considered
