一般实验室不应（）剧毒药物。
A.短期保存
B.长期保存
C.经常使用
D.短期使用
参考答案：B
Many beautiful buildings ______ in our city last year. [ ]
A. are built
B. were built
C. is built
D. was built
施工总承包方和分包方的项目管理都属于( )的项目管理。
A．投资方
B．施工方
C．分包方
D．总承包方
