小儿麻痹症多见于几岁小儿:()
A.1~2岁
B.1~3岁
C.1~5岁
D.2~6岁
E.2岁以下
参考答案:C
各单位在电气化区段施工作业时,必须制定()安全卡控措施。
A、一级
B、二级
C、三级
D、四级
From()the information concerning the tons per inch or centimeter immersion of a vessel shall be usually found.
A.variation curve
B.dead weight scale
C.table of azimuth
D.freeboard assignment