学前儿童运动系统有何特点？如何做好学前儿童运动系统的卫生保健工作？.
中国的传统宗教是：（） ["佛教","神道教","道教","景教"]
农用养份循环中，氮素的损失途径包括（） ["挥发","水蚀","降雨淋失","沉积","风蚀"]
What are three features of voice traffic on a network？（） ["bursty","constant","bandwidth intensive","small packet sizes","time-sensitive","retransmittable"]
封闭性规律
OT作业治疗
