![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[主观题]
_______forthefreeticket,Iwouldnothavegonetoseefilmsooften.A.IfitisnotB.WereitnotC.Haditnot
_______ for the free ticket, I would not have gone to see film so often. A. If it is not B. Were it not C. Had it not been D. If they were not
查看答案
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
_______ for the free ticket, I would not have gone to see film so often. A. If it is not B. Were it not C. Had it not been D. If they were not
已知地月距离约为3.8×105km.用口径为1m的天文望远镜能分辨月球表面两点的最小距离是多少?
若望远镜能分辨角距离为3×10-7rad的两颗星,它的物镜的最小直径是多少?同时为了充分利用望远镜的分辨本领,望远镜应有多大的放大率?
A.超声的分辨力主要与超声的频率有关。
B.纵向分辨力是指与超声垂直的平面上两个障碍物能被分辨的最小间距。
C.超声的分辨力越高,超声在人体中的传播距离越远。
D.为提高超声的横向分辨力,不可以通过声学聚焦的方法实现。
A.n越大,最小可分辨距离越大
B.n越大,最小可分辨距离越小
C.最小可分辨距离与n值大小无关
D.n值与最小可分辨距离成反比
A.这名小朋友的视力还可以记录为:右眼20/20,左眼20/100
B.这名小朋友的最小可分辨视角为:右眼1弧分,左眼为0.2弧分
C.这名小朋友双眼的空间分辨能力,右眼是大于左眼的
D.采用LogMAR来表达这名小朋友的视力,则右眼视力为0,左眼视力为0.7
A.2 倍
B.3 倍
C.4 倍
D.5 倍