在中央实行“三省六部制”的朝代是（）
A.秦代
B.两汉
C.魏晋
D.隋唐
参考答案：D
The project requires more labor than _____ because it is extremely difficult.[ ]
a. has been put in
b. have been put in
c. being put in
d. to be put in
慢性肺源性心脏病的并发症，下列哪一项是错误的
A．肺性脑病和上消化道出血B．酸碱平衡失调及电解质紊乱C．心律失常和肾衰竭D．休克与弥散性血管内凝血E．心力衰竭
