药材横切面中央有“S”形折曲的黄色子叶的是（）。
A.补骨脂
B.巴豆
C.决明子
D.菟丝子
E.肉豆蔻
参考答案：C
She showed the visitors around the museum, the construction _____ had taken more than three years.
A．for which
B．with which
C．of which
D．to which
机房地面有任何最小深度大于（）MM，宽度小于0.50M的凹坑或任何槽坑时，均应盖住。
A、300
B、500
C、800
D、1000
