钢丝绳表面磨损或腐蚀使原钢丝绳的名义直径减少（）时，即使不断也应该报废是不正确的。
A.1%
B.3%
C.5%
D.7%
参考答案：A, B, C
If I try to correct someone, I have to do it with so much good humor and bright smile as if I were the one ______.
A．to have been corrected
B．correcting
C．having been corrected
D．being corrected
对于骨质软化症的叙述哪一项是错误的（）
A.血清铝水平增高
B.长期低磷血症可引起
C.是一种继发于骨质疏松的佝偻病
D.长期维生素D缺乏可引起
E.高发于经绝后高龄妇女
