纯净的钻石是透明的，因此其表面呈典型的（）光泽。
A.金属
B.半金属
C.金刚
D.玻璃
参考答案：C
New York, also ________ Big Apple, becomes one of the world's greatest business centers. [ ]
A. known
B. known as
C. known to
D. known for
腹股沟疝检查时，压迫内环的部位在（）
A.精索的内前方2cm
B.髂前上棘与耻骨结节连线的中点
C.腹股沟韧带中点上方1.5～2cm
D.耻骨结节外侧2cm
E.肿块隆起最明显处
