正常婴儿,体重4千克,前囟1.5cm×1.0cm,后囟0.2cm,头不能竖起,最可能的月龄为()
A. 28天以内
B. 1~2个月
C. 3个月
D. 4个月
E. 5个月
():大锡林上的纤维部分分配给道夫之后,留在锡林每平方米针面上的纤维重量。
是否能够明确地测定出具体的空间位置是区别心理事件与物理事件的最重要的特点。
A. 正确
B. 错误
Electric cargo winches have an overload safety device which normally cuts the current to the winch motor().
A. after torque cause line pull to exceed the rated capacity of the winch
B. before the line pull reaches the rated capacity of the winch
C. when the line pull reaches the breaking strengh of the fall
D. before the safe working load of the fall is reached