【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....
【简答题】编制利润表所依据的平衡公式是( )。 A、收入=利润 B、成本费用=利润 C、收入=成本费用 D、收入—成本费用=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】开式齿轮传动应按齿根弯曲疲劳强度设计,按齿面接触疲劳强度校核。
【单选题】______ more and more people may refer to the Internet for up-to-minute news, the newspaper will not disappear.
【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。
【单选题】This bus ______ to be able to hold more than 50 people.