“On no account _____ to feed the animals,” the warning can be seen on the signboard on front of every cage (笼子).

A．allow visitors

B．are visitors allowed

C．visitors are allowed

D．are allowed visitors

休克缺血、缺氧期发生的急性肾功能衰竭是属于()

A．功能性肾功能衰竭

B．阻塞性肾功能衰竭

C．器质性肾功能衰竭

D．肾性肾功能衰竭

E．肾前性和肾性肾功能衰竭