国际儿童节是______月______日,在第______季度.
国际儿童节是6月1日,在第二季度.
故答案为:6,1,二.
The two economic reports were delivered by our president at the board last Monday and ______was
very instructive[ ]
A. either
B. all
C. none
D. neither
蒸汽透平内的主要介质是()。
A.低压蒸汽
B.中压蒸汽
C.高压蒸汽
D.以上三种都不是