隋唐时期，淮水以北新增的有利于农田灌溉的水利工程是
A．郑国渠
B．芍陂
C．通济渠
D．邗沟
答案：C
What _____ it is to go camping in _____ weather!
A．a great fun; so fine
B．a great fun; such a fine
C．great fun; so fine a
D．great fun；such fine
不能消除可摘局部义齿翘动的是（）.
A.增加间接固位体
B.增大平衡距
C.增大游离距
D.增加基托面积
E.骨突处基托组织面缓冲
