天冬的功效是（）。沙参的功效是（）。
A.滋补肝肾
B.补脾益气
C.滋阴除烦
D.清肺降火
E.清肺养阴
参考答案：D,E
不含氢、氧二种元素的化合物，可能属于（ ）
A．酸
B．碱
C．盐
D．氧化物
— Who should be responsible for the accident?
— The boss, not the workers. They just carried out the order _____.
[ ]
A. as told
B. as are told
C. as telling
D. as they told
