东风8B型机车柴油机的排气门冷态间隙为()。
A、0.4mm
B、0.5mm
C、0.6mm
D、0.8mm
参考答案:B
"Each day was a _____," she told groups of students gathered in the school auditorium. [ ]
A. struggle
B. war
C. battle
D. dream
婴幼儿尿液清亮透明,寒冷时可能转变为白色泡沫状。