样地
参考答案:
根据预期目的和精度要求,按抽样原理随机设置一定数量、相同大小、落在特定点的地块取得相应的调查资料。
---Monitor? --- I’m not monitor of our class. I __ with the teacher until the monitor is elected.
A.will just help
B.am just to help
C.am just helping
D.have just helped
患者进行腹式呼吸锻炼时,下列动作应予以纠正的是()。
A.吸气时腹部尽力挺出
B.用鼻吸入
C.呼气时腹部尽力收缩
D.用口呼出
E.深吸快呼