下列舱室不是缺氧的舱室是（）.
A、载运小麦的舱室
B、载运废钢铁的舱室
C、载运冷冻货的舱室
D、载运煤碳的舱室
参考答案：C
All of the following are required for a CFA Institute member to maintain his or her active status EXCEFF:（）
A. remit a completed Professional Conduct Statement on an annual basis.
B. Passing each exam in no more than two tries.
C. paying membership dues to CFA Institute on an annual basis.
珍珠的鉴别特征不包括下列哪一项（）
A.表面类白色，浅粉红色或浅蓝色
B.半透明，具特有的彩色光泽
C.质地坚硬，断面可见辐射状纹理，粉性
D.无臭，味淡
E.磨片可见"珍珠结构环"及"珍珠虹光环"
