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【多选题】
齿式棘轮机构棘轮转角大小的调节方法有_________。A.
改变摇杆摆角大小
B.
利用遮罩遮盖棘轮部分棘齿
C.
调节电机的转速
D.
所有选项都不对
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皮皮学刷刷变学霸
举一反三
【单选题】During the cardiac cycle,
A.
the volume of blood leaving the left side of the heart is greater than that leaving the right side.
B.
the pressure of blood leaving the right side of the heart is greater than that leaving the left side.
C.
the duration of systole is greater than that of diastole.
D.
the duration of diastole is greater than that of systole.
【简答题】秦代规定每年祭祀________,月神就是其中之一,称为月主。
【单选题】During the cardiac cycle,
A.
the duration of diastole is greater than that of systole.
B.
the volume of blood leaving the left side of the heart is greater than that leaving the right side.
C.
the pressure of blood leaving the right side of the heart is greater than that leaving the left side.
D.
the duration of systole is greater than that of diastole.
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