下列定额中，( )一般适用于新建、扩建、改建工程。
A．预算定额B．概算定额C．建筑工程定额D．施工定额
参考答案：A
Last Saturday, Lucy _____ in the morning, and _____ in the afternoon. [ ]
A. clean her room; go to the library
B. cleaned her room; go to the library
C. cleaned her room; went to the library
《铁路技术管理规程》规定，听觉信号的鸣示时间？
