下列现象能导致离心泵不打量的是()。
A、填料太紧
B、贮液罐液位过高
C、电机相线接反
D、地角螺栓松动
参考答案:C
________ with others easily will be harmful to your health, so keep a goodtempered character all the time please. [ ]
A. To be annoyed
B. Being annoyed
C. To be pleased
D. Being satisfied
下列有关器官系统发育不平衡性的描述中正确的是
A.生殖系统发育较早B.神经系统发育领先C.淋巴系统到青春期开始发育D.皮下脂肪年长时发育较发达E.肌肉组织的发育到青春期才加速