— What did your father do yesterday?

搜题请搜索小程序“爱下问搜题”

问题选择题

— He ____________ the floor. [ ]

A. clean

B. cleans

C. cleaned

D. cleaning

答案

答案：C

单项选择题

轿顾应没置防护栏杆，高度为（）毫米。

A、600

B、800

C、700

D、1000

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单项选择题

As part of the quality audit, the scope statement is checked against the work results to ensure the conformance to the customer requirements. The results should be documented and used for ______ .

A．estimating future projects

B．changing the project scope

C．defining future project tasks

D．validating the quality process

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