对肾的描述错误的是 ( )
A．是泌尿器官
B．左肾低于右肾
C．有三层被膜
D．内侧缘中部有肾门
参考答案：B
Tom was very angry about ________ to Mary’s birthday party.
A．not inviting
B．being not invited
C．not being invited
D．not to be invited
硫乙醇酸钠可作为下列哪种培养瓶的添加物质（）
A.需氧培养瓶
B.厌氧培养瓶
C.结核菌培养瓶
D.高渗培养瓶
E.树脂瓶
