莲子的功效是（）。补骨脂的功效是（）。
A.大补元气
B.接续筋骨
C.补益肺肾
D.补脾益肾
E.补脾养心
参考答案：E,D
__ we know, in a chemical change, energy cannot be created, ____.
A．Which, nor can it be destroyed
B．As, neither it can be destroyed
C．As, neither is it able to be destroyed
D．What, nor is destroyed
金属铸造的滑轮槽壁厚磨损达原壁厚的20%时应报废。（）
A、正确
B、错误
