在鱼类及水产品中常见的食品细菌是
A．假单胞菌属B．葡萄球菌属C．芽胞杆菌属D．肠杆菌科E．弧菌属
参考答案：E
—— This is one of the oldest trees in the world.
_____ such a big tree.
A．Never I have seen
B．I haven't never seen
C．Never have I seen
D．I have seen never
在PowePoint中利用“自选图形”画图时，按下（）键，所有图形都会以中心点基准等比例缩放。
