【单选题】在图示的轮系中,已知各轮齿数为z1=20,z2=30,z3=40,z4=60。试求该轮系的传动比i14。【图片】
【单选题】☆1198.西餐中汤汁较多的菜肴多配( )。
【单选题】假设肺通气量为7000ml/min,呼吸频率为20 次/分,无效腔容量为100ml,每分心输出 量为5000ml 时,其通气/血量比值为
【单选题】在图示的轮系中,已知各轮齿数为z1=20,z2=30,z3=40,z4=80。试求该轮系的传动比i14。【图片】
【多选题】选词填空
F.
came to herself When we returned to the classroom, the teacher asked us to keep ________. At last, she __________,but she couldn't tell what had happened. This morning the teacher________that he would play games with us . The boy promised his father not to _________any more. I don't __________he is right. You can't________her, she cannot take care of your baby.
【单选题】在图示的轮系中,已知z1=20,z2=40,z2'=20,z3=30,z'3=20,z4=40,则轮系的速比i14=_______。【图片】
【单选题】假设肺通气量为7000ml/min,呼吸频率为20次/min,无效腔容量为100ml,每分心输出量为5000ml时,通气血流比值为
【单选题】在图示的轮系中,已知z1=20,z2=40,z2'=20,z3=30,z'3=20,z4=40,则轮系的速比i14=_______。【图片】
【判断题】Don't keep silent during the meeting. I want to hear your opinion
【判断题】Keep silent! I don't want to hear sound. 这句话表述正确吗?