磨床加工精度较高，工作经磨削后尺寸精度可达( )。A．IT3～IT4 B．IT5～ 发布时间：2017-05-21 20:23 │ 来源：www.tikuol.com 题型：单项选择题 问题： 磨床加工精度较高，工作经磨削后尺寸精度可达( )。A．IT3～IT4B．IT5～IT6C．ITl0～ITl2D．ITl3～ITl5
题型：单项选择题 完形填空。 This is my friend _1_name is Tom Read. He is 2 English boy . He is fourteen. He is in No. 4 Middle School. He is in 3 This is my English teacher . She is a 4_. Her name 5 Li Ying. She is 6 . She is in 7 . Her 8 number is 6655234. She 9 a bike. It's red. She likes it very much.She is my good teacher.She is my good 10 ,too.( ) 1. A.Her ( ) 2. A.a ( ) 3. A.class 1,grade 2 ( ) 4. A.woman ( ) 5. A.are ( ) 6. A.tall ( ) 7. A.a black shoes ( ) 8. A.bus ( ) 9. A.has ( ) 10.A.teacher B. His B. an B. Class 1,Grade 2 B. man B. am B. big eyes B. black shoes B. bike B. have B. friend C. Your C. the C. Grade 2, Class 1 C. girl C. is C. long hair C. black shoe C. telephone C. is C. student 查看答案
题型：单项选择题 已知：甲乙两组数据的平均数都是5，甲组数据的方差S2甲=112，乙组数据的方差S2乙=110，下列结论中正确的是（ ）A．甲组数据比乙组数据的波动大B．乙组数据的比甲组数据的波动大C．甲组数据与乙组数据的波动一样大D．甲组数据与乙组数据的波动不能比较 查看答案
题型：单项选择题 写出下列六个省市的一个字的简称正确的一项（）。①河北②河南③湖北④安徽⑤贵州⑥江西A．①察 ②豫 ③湘 ④鄂 ⑤贵 ⑥江B．①冀 ②豫 ③鄂 ④皖 ⑤黔 ⑥赣C．①冀 ②河 ③鄂 ④皖 ⑤贵 ⑥赣D．①冀 ②河 ③湘 ④皖 ⑤黔 ⑥江 查看答案