在全液压起重机中，支腿机构液压回路的立式液压缸上腔油路中装有（），起液压锁作用。
A、平衡阀
B、普通单向阀
C、液控单向阀
参考答案：C
根据所给图画，在短文空格内填写适当的单词，使短文通顺、完整。
There is a little girl standing in 1 of the window. There are some 2 outside the house.
There is a 3 beside her. There are some bananas 4 the 5 and a birthday cake on the table.
On the cake there are some 6 . The girl has a box in her 7 . She is looking 8 it 8 a big smile.
What is in the 10 ? Do you know?
建设项目策划是业主方管理的重要组成部分，在建设项目( )进行。
A．实施期
B．决策期
C．运营期
D．调整期
E．检修期
