皮皮学，免费搜题
登录
搜题
【单选题】
The Reason why there are specks when a person looks at bright light is that __________ .A.
the person doesn't have a good habit of looking at bright light
B.
the watery fluid in the person's lens isn't so clear as possible
C.
the person's eye is hurt for the time being because of a sudden strike
D.
something remains from his days in the uterus when he was under formation
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】图示间歇运动机构与其它常见间歇运动机构相比,最大的优点是( )。
A.
(A) 可实现间歇分度
B.
(B) 运动过程无冲击
C.
(C) 将转动转化为间歇转动
D.
(D)结构简单，造价低
【单选题】足月产是指
A.
妊娠满37周至不满42足周期间分娩
B.
妊娠满42周之后分娩
C.
妊娠满28周至不满37足周分娩
D.
妊娠满37周至满42足周期间分娩
E.
满42妊娠周之前分娩
参考解析：
知识点：
题目纠错 0
发布
