视神经可分为()、()、()、()。
参考答案:眼内段;眶内段;管内段;颅内段
It is careless _______ such a mistake.
A.of you to make
B.of your making
C.for you to make
D.for your making
电缆竣工图比例尺宜为()。
A.1:100
B.1:200
C.1:500