曲线反弯是指直缓点或缓直点及其20m内的直线段有()的正矢,曲线段正矢有负值。
A、≤-1mm
B、≤-2mm
C、≤-3mm
D、≤-4mm
参考答案:B
在“齿牙完坚”中,“完”之义为()
A.完整
B.完结
C.完全
D.完了
Life insurance, before available only to young, healthy persons, can now be obtained for quite a large proportion of the elderly population, and, sorry, even for pet animals.
A.before young, healthy persons available only,
B.available only to young, healthy persons before,
C.available only to persons young, but more healthy,
D.before young and healthy persons only available to,