多项选择题旁路装置的基本类型有（ ）。 A、高压旁路 B、整机旁路 C、低压旁路 D、两级串联旁路 E、三级旁路
单项选择题World AIDS Day is one of the eight official global public health campaigns marked by ______. A. the World Health Organization B. the World Trade Organization C. the World Agriculture Organization D. the World Culture Organization
