823DP电动差压变送器喷嘴上游进口管段（）偏差不得大于0.01D
A、弯曲度
B、圆度
C、同心度
D、线性度
参考答案：B
妇女更年期的生理变化，主要与下列哪个器官的衰老密切相关（）
A.子宫
B.卵巢
C.乳腺
D.下丘脑
E.垂体
-Bill Gates was so nice that he decided to ninety percent of his money to charities.
A．give up
B．give away
C．give out
D．give off
