简述弹簧管式一般压力表的示值检定项目。
参考答案:
弹簧管式一般压力表的示值检定项目有:
①零位示值误差;
②示值基本误差;
③回程误差;
④轻敲表壳后,其指针示值变动量;
⑤耐压检定
John received an invitation to dinner, and with his work ________, he gladly accepted it.
A.finished
B.finishing
C.having finished
D.was finished
钩端螺旋体培养选择的培养基是()
A.柯氏培养基
B.碱性蛋白胨培养基
C.胆汁培养基
D.含血培养基
E.巧克力色血琼脂培养基