The main function of the core of a wire rope is to（）.
A. give flexibility
B. support the strands laid around it
C. allow some circulation around the strands
D. allow lubrication inside the rope
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What two descriptions best define DWDM？ （）
A. a WDM system that is compatible with EDFA technology
B. an optical technology for transmitting up to 16 channels over multiple fiber strands
C. an optical technology for transmitting up to 32 channels over multiple fiber strands
D. a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM
E. a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
属于中国证监会基金监管部的职责是（） Ⅰ．对基金从业人员实施资格管理和资格考试 Ⅱ．草拟或指定基金行业的监管规则 Ⅲ．对有关基金和行政许可项目进行审核 Ⅳ．全面负责对基金管理公司、基金托管银行及基金代销机构的监管
A. Ⅱ、Ⅲ、Ⅳ
B. Ⅰ、Ⅱ、Ⅲ
C. Ⅰ、Ⅲ、Ⅳ
D. Ⅱ、Ⅳ
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