【单选题】协助牙齿稀少或无牙的老人漱口前的准备工作正确的事:
B.
向老人说明操作内容,做“漱口水要吐出来”的解释工作
【简答题】如图所示包装机送纸机构,计算机构自由度,并确定机构是否具有确定的运动。要求写出计算公式,若机构存在复合铰链、局部自由度以及虚约束,则需指出其在图上对应的位置。
【单选题】协助牙齿稀少或无牙的老人漱口前的准备工作正确的是()。
B.
向老人说明操作内容,做“漱口水要吐出来”的解释工作
【单选题】听力原文: The human brain processes male and female voices differently, according to a recent study, which explains why most of us hear female voices more clearly. The study also explains how we form. men...
A.
Because their voices are more pleasant to listen to.
B.
Because the possessing of voices in the brain is different.
C.
Because listening to women requires more brain activities.
D.
Because women's voices are full of melodies.