挡水坝、溢洪道、水闸等属于( )水工建筑物。
A．专门性 B．特殊性 C．整治性 D．一般性
参考答案：D
已知一个菱形的周长为20cm，它的一条对角线的长为6cm，那么这个菱形的另一条对角线的长为______cm．
He was the new invention and asked the scientist about it over and over again. [ ]
A. curious about
B. angry with
C. friendly to
D. strict with
