皮皮学，免费搜题
登录
搜题
【单选题】
关于重心的说法，正确的是（）A.
重心就是物体内重力最大的部分
B.
因为重心是物体所受重力的作用点，所以重心在物体上，不可能在物体外
C.
物体升高或降低，重心相对于物体的位置保持不变
D.
如果物体有对称中心，则该对称中心就是重心
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】— She's really pretty, isn't she? Her skin looks so baby smooth! — Well, it's just that she puts lots of make-up on her face. _______ . [ ]
A.
Sometimes I wish I could be as beautiful
B.
Actually, natural beauty comes from inside
C.
I can believe she is still so pretty after giving birth to a baby!
D.
Fortunately, she has a good income.
【简答题】根据红细胞内所含的（）不同，将人的血型分为四种类型，即（）型血、（）型血、（）型血、（）型血。
【简答题】根据红细胞内所含____的不同,将人的血型分为四种类型,即____型血、____型血、____型血和____型血。
【单选题】— I often walk home after school. — ______. [ ]
A.
So she is
B.
So is she
C.
So she does
D.
So does she
【单选题】According to the passage, the blue jeans' popularity was caused by ______.
A.
nineteenth-century laborers
B.
American film and media
C.
the unfolding of popular culture
D.
the imaginations of city folk
相关题目：
参考解析：
知识点：
题目纠错 0
发布
