皮皮学，免费搜题
登录
搜题
【简答题】
汽车的轮胎上刻有凹凸不平的花纹,这是为了____,机器转轴上一般都装有滚动轴承,这是用____代替____达到____目的,为了防止传动皮带打滑,需要将皮带张紧,这是用____的方法来达到____的目的.
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】日俄战争后双方签订【 】,日本如愿以偿地从俄国手中得到了中东铁路的南满铁路以及旅大地区的租借权,为侵略中国东北埋下伏笔。
A.
日内瓦和约
B.
朴茨茅斯条约
C.
雅尔塔协议
D.
马关条约
【单选题】The title “Cell-to-cell contact induces mesenchymal stem cells to differentiate into cardiomyocyte and smooth muscle cells” is a declarative sentence because the authors may ________.
A.
want to state their findings as clearly and completely as possible
B.
want to show the complexity of their research design and findings
C.
have found strong evidence to prove that cell-to-cell contact induces the differentiation of mesenchymal stem cells
D.
/
【简答题】Smooth muscle cells are ____________, which means they don’t have stripes.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
