“有项目”与“无项目”效益和费用的计算期应如何确定？
Which of the following activities activities does not involve writing？
A. Completion according to outlines.
B. Completion with multiple choices.
Completion according to topic sentences.
D. Completion according to the brainstormin
根椐我国有关法律法规规定锅炉、高压容器、压力管道和起重设备属于特种设备。()
集水坑排水的特点是设置集水坑和排水沟，根据工程的不同特点具体有以下几种方法：明沟与集水井排水、分层明沟排水、深层明沟排水、暗沟排水和利用工程设施排水。()
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