某中学实验楼的土建工程属于()。
A.单项工程
B.单位工程
C.建设工程
D.分项工程
参考答案:B
— How long has Wanda Square_______?
— It is more than five years________ it opened.
A.opened; since
B.open; before
C.been open; since
D.been opened; since
电气装置(electrical installation)