下列不属于维多利亚宣言中保证健康心脏主要措施的是()
A. 合理膳食
B. 限量吸烟
C. 限量饮酒
D. 适量运动
E. 心理平衡
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炭化室装煤缺角,影响焦炭质量。
A. 正确
B. 错误
范仲淹的《岳阳楼记》中哪个成语泛指忧愁失意的文人?
下列几种真空装置中,()产生的真空度最易受季节影响。
A. 蒸汽喷射泵
B. 水力喷射泵
C. 干式真空泵
D. 水环真空泵
The greatest effect on stability occurs from loose liquids flowing().
A. from side to side in the tanks of the vessel
B. from fore to aft in the tanks of a vessel
C. in and out of a vessel that is holed in a wing tank
D. in and out of a vessel that is holed in a peak tank