评定机械振动水平时的测定点位置总是在()上。A.基础 B.轴 C.基座 D.管子 发布时间:2019-08-03 10:32 │ 来源:www.tikuol.com 题型:单项选择题 问题: 评定机械振动水平时的测定点位置总是在()上。A.基础B.轴C.基座D.管子
题型:单项选择题 读句子,选择适当的介词填空。at in to for on1. Danny looks ____________ many shops. 2. Look ____________ my ear. It hurts. 3. There are apples ____________ the tree. 4. There are two birds ____________ the tree. 5. Let's walk ____________ the movie theatre. 6. I want to buy a dress ____________ my sister. 查看答案
题型:单项选择题 下列有关生物大分子在细胞内转移的叙述,错误的是[ ]A.分泌蛋白可由核糖体进入内质网B.DNA可由细胞核进入线粒体C.mRNA可由细胞核进入细胞质D.tRNA可由细胞质基质进入核糖体 查看答案