A.
B.
C.
D.
[单选题]A.B.C.D.
[单选题]A.32B.48C.64D.16
[判断题]A.对B.错
[单选题]A.B.C.D.E.
[单选题]A.竖直角B.尺间隔C.水平距离D.水平角