煤矿与从业人员订立的劳动合同,应当载明有关保障从业人员()防止()的事项。
A、工资待遇
B、劳动安全
C、生活福利
D、职业危害
E、身体健康
参考答案:B, D
如图2—1甲所示,质量为m的物体放在轻弹簧上静止不动,当用力F使其竖直向上作匀加速直线运动,在图2—1乙所示的四个图象中,哪个能反映在物体脱离弹簧前的过程中,力F随时间t变化的规律
We suggest that you file a claim ______ the shipping company for all the losses incurred as a consequence of failure to ship the goods ______ Order No. 123 in time.()
A. against, unless
B. for, in
C. against, in
D. against, under