手提式或移动式磁粉探伤设备的电缆线可制成线圈作为纵向磁化线圈使用。
参考答案：对
A client with newly diagnosed type 1 diabetes mellitus is learning about diabetic foot care. Which of the following statements by the client indicates further instruction is needed
A. "I should use lotions. "B. "I should use antiperspirants. "C. "I should use foot soaks. "D. "I should use nail files. "
如图4-61所示，两重物M1和M2的质量分别为m1和m2，二重物系在不计重量的软绳上，绳绕过均质定滑轮，滑轮半径为r，质量为M，则此滑轮系统的动量为（）。
A.
B.（m1-m2）rν（竖直向下）
C.
D.（m1-m2）rν（竖直向上）
