问题：
[单选题]用起重机吊起一个40吨重的物体，吊索最多可承受50吨的拉力，吊索本身的重量可不计，要使吊索不断，物体向上的最大加速度多大。（）
A、0.3m/s^2
B、0.35m/s^2
C、0.2m/s^2
D、0.25m/s^2
参考答案：
D
相关内容
- ● 用起重机吊起一个40吨重的物体，吊索最多可承受50吨的拉力，吊索本身的重量可不计，要使吊索不断，物体向上的最大加速度多大。（）
- ● 用起重机吊起一个40吨重的物体，吊索最多可承受50吨的拉力，吊索本身的重量可不计，物体吊在空中静止时，吊索所承受的拉力是多少？（）
- ● CASE OF DEATH OR SERIOUS INJURY TO A PERSON IN AN ACCIDENT OR SHIPPING DISASTER i（）.
- ● Mainly eat 3 or 4 partly cloudy to overcat occaional rain（）lowly outh moderate or good.
- ● （）any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local quarantine officer mut be notified immediately．
- ● Should any cae or upected cae of quarantinable dieae，or any cae of eruptive dieae or any death be dicovered，the local Quarantine Officer mut be（）immediately.
- ● 已知A=40；B=30；C=100；D=50，逻辑“与”运算符为and，“或”运算符为or，“非”运算符为not。计算表达式（A>B+20）or（B+60
- ● Mater are（）olely reponible for all damage or accident of whatever kind reulting from the navigating or handling of their veel by day or by night.
- ● If he i a common carrier，he i abolutely reponible to the owner of the good carried （）any lo or damage to them unle caued by an Act of God or the Queen’ enemie，or the inherent vice in the good themelve，or the negligence of the owner of the good，or a general average acrifice.
- ● 系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。
- ● Owner are to be reponible for lo of or damage to the good or delay in delivery of the good only in cae the lo，damage or delay ha been caued by the improper or negligent towage of the good．Thi mean that（）.
- ● The carrier i liable for lo of or damage to the good or delay in delivery caued by fire，（）the claimant prove that the fire aroe from fault or neglect on the part of the carrier，hi ervant or agent.
