能使水流形成螺旋转和产生离心力，从而形成雾化水流的是（）喷雾水枪。
A、导流式
B、撞击式
C、离心式
D、簧片式
参考答案：C
氨苯蝶淀的利尿作用机制是（）
A．抑制碳酸酐酶
B．抑制K+，Na+ -2Cl-同向转运系统
C．桔抗醛固酮
D．抑制远曲小管和集合管对Na+的吸收
E．抑制Na+ -Cl-转运系统
Which of the following circumstances is an example of event risk（）
A. A currency devalues due to foreign exchange market forces.
B. A local government regulatory agency introduces more stringent clean-water requirements that will significantly reduce the cash flow of an area paper mill.
C. The U. S. Federal Reserve unexpectedly increases interest rates by 100 basis points.
