兴奋性是指机体组织、细胞对刺激发生____的能力，其能力大小与____呈____关系。
参考答案：兴奋；阈值；反比
_____ interested her most was the longitude line. It’s an imaginary line ______ the eastern and western halves of the world.
A．That; dividing
B．What; divided
C．That; divided
D．What; dividing
现金流出与现金流入之差称为（）
A.现金流量
B.净现金流量
C.收入
D.经运营收益
