高热、头痛、呕吐，全身皮肤散在瘀点，颈项强直，最可能的诊断是（）

A.结核性脑膜炎

B.流行性脑脊髓膜炎

C.流行性乙型脑炎

D.伤寒

E.中毒性细菌性痢疾

A client with myocardial infarction and cardiogenic shock is placed in an intra-aortic balloon pump (IABP). If the device is functioning properly, the balloon inflates when the

A．triseupid valve is closed.

B．pulmonic valve is open.

C．aortic valve is closed.

D．mitral valve is closed.