斜方肌和前锯肌下部肌纤维可以使肩胛骨()
A.上提
B.下降
C.前伸
D.后缩
E.上回旋
参考答案:B
—What should you do if you have problems with your life?
— .[ ]
A. To find a friend to talk
B. Find a friend to talk to
C. Finding a friend to talk to
D. Found a friend to talk
下面为防止静电采取的措施,错误的是( )。
A.与烟火药直接接触的生产工具使用塑料制品
B.凡是接触烟火药的机械传动部分严禁采用非金属搭扣胶带
C.有烟火药的生产车间内可能积聚静电的设备,必须可靠接地
D.应根据工作性质和劳动条件,配备符合要求的不会产生静电的个人防护用品