变压器并列运行的基本条件是()
A.容量相同
B.联结组别相同
C.电压比相等
D.短路阻抗相等
参考答案:B, C, D
初级卫生保健的工作重点应是()
A.治疗疾病
B.预防和促进健康
C.社区康复
D.计划生育
E.寻找各种致病因素
It is generally believed that constant reading and comprehending can ______ our mental ability of comprehension while physical exercise can help build up our body.
A.stress
B.effect
C.strengthen
D.decide