We are waiting for ______. [ ]
A. she comes
B. her to come
C. her come
答案：B
水准基点是进行精密变形观测的高程控制网的起始点并作为沉降观测基准的水准点基点设置以保证其稳定可靠性为原则。( )
请说明影响幼儿期身体发展的因素有哪些并请分别举例。
