下列哪一种不属于摩擦传动的优点()。
A.传递时有较大扭矩,传动比准确
B.机构简单,成本低廉
C.运动无噪声
D.过载时有保护作用
参考答案:A
A client with chronic obstructive pulmonary disease (COPD) and cor pulmonale is being prepared for discharge. The nurse should provide which instructions()
A. "Weigh yourself daily and report a loss of 1 lb in 1 day. "
B. "Eat a high-sodium diet. "
C. "Weigh yourself daily and report a gain of 2 lb in 1 day. "
D. "Maintain bedrest. "
儿童有意运动的特点是()。
A.它是天生就会的,是无条件的反射运动
B.人在完成某一有意运动时,在头脑中预先产生了运动的目的
C.有意运动是后天学会的
D.是被动运动的,它是人没有意识到的