In my opinion, _____ shouldn't be any doubt that China will become one of the most powerful countries

in the near future. [ ]

A. this

B. that

C. it

D. there

在下列病变中，哪些需要动态增强扫描()

A．乳腺癌

B．肝癌

C．颅脑肿瘤

D．垂体微腺瘤

E．以上均需要