拟有膀胱破裂，临床首选的诊断方法是()

A．膀胱造影

B．膀胱镜检查

C．膀胱内注水试验

D．腹部平片

E．B超

We are confident that the step the Chinese government has taken to cope with the current crisis is ______ of great significance.

A．what

B．those

C．that

D．one