文艺、体育和特种工业单位招用未满16周岁的未成年人,不必再让起接受义务教育。
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事件一种,监理工程师同意中止沉桩是否正确?预应力管桩的沉桩方法通常有哪几种?
DCCH—Dedicated Control Channel,即专用控制信道,由三个子信道组成,其中不包括()。
A. CACCH
B. SDCCH
C. FACCH
D. SACCH
假想用剖切平面将机件的某部分切断,仅画出被切断表面(截面)的图形称为剖视图。
A. 正确
B. 错误
Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all().
A. fire stations aboard the vessel,except for those in open deck areas weatherdeck and cargo hold fire stations
B. interior fire stations
C. engine room fire stations
D. all of the above