【简答题】A.Physical health may help people with their memory problem. B.People should learn more tricks to help memory when they are old. C.There are other factors leading to the memory loss of elderly people....
【判断题】开式齿轮传动的主要失效形式是:齿根弯曲疲劳折断,齿面的磨粒磨损。因此对应的设计原则是:按齿根弯曲疲劳强度设计计算,再适当增大模数以考虑齿面磨粒磨损的影响。
【判断题】不论何种格式的利润表都是用收入减费用计算利润。
【判断题】开式齿轮传动应按齿根弯曲疲劳强度设计,按齿面接触疲劳强度校核。 ( )
【判断题】开式齿轮传动的主要失效形式是齿根弯断,故应按齿根弯曲疲劳强度设计。
【判断题】开式齿轮传动的主要失效形式是齿面磨损,所以设计准则应按齿面接触疲劳强度进行设计,按齿根弯曲疲劳强度进行校核。
【判断题】出纳人员应按期与银行对帐,按日编制银行存款余额调节表,随时处理未达帐项。
【单选题】This bus ______ to be able to hold more than 50 people.
【简答题】It is no surprise that more and more people like bicycling, because it is fun, healthy and good. Maybe that's why there are 1.4 billion bicycles and only 400 million cars on roads worldwide today, Bik...