政府统计调查包括国家统计调查、( )和地方统计调查三类。
A.部门统计调查
B.涉外统计调查
C.民间统计调查
D.企事业统计调查
参考答案:A
停用期间未采取保护措施,则汽包本体及整个水汽系统的金属表面都会遭到溶解氧腐蚀,但停炉腐蚀比运行期间慢得多。
______ of the parents has confirmed it was their child’s fault to be late for class, saying the school bus came later than usual.
A.Both
B.Either
C.None
D.Neither