为了了解1200名学生对学校某项校改试验的意见,打算从中抽取一个容量为30的样本 发布时间:2017-05-03 09:19 │ 来源:www.tikuol.com 题型:选择题 问题: 为了了解1200名学生对学校某项校改试验的意见,打算从中抽取一个容量为30的样本,考虑采用系统抽样法,则分段的间隔k为 [ ]A.40 B.30 C.20 D.12
题型:选择题 选择方框内的单词完成句子,只需填选项号。A. hundred B. farthest C. success D. the same as E. took part in F. because of小题1:Tony ______________ the singing competition and got first prize in his group.小题2:My friend is ___________ me. We are both quiet.小题3:Harbin is in northern China, and it’s the ____________ of the three cities.小题4:---How far is the aquarium from here? –It’s only about five _________ meters away.小题5:Last week’s talent show was a great _____________.小题6:He stopped playing soccer _____________ his sore back. 查看答案
题型:选择题 克雷伯杆菌肺炎的X线表现叶间隙下坠原因是()A.肺泡内的渗出液由Cohn孔向周围肺泡蔓延所致B.细菌在肺泡内生长繁殖,引起组织坏死、液化形成C.病变中的炎性渗出液黏稠而重D.肺泡内的纤维蛋白渗出较多E.肺泡内的渗出含有较多的红白细胞 查看答案