综采工作面中的“三机”配套指的是（）、（）、（）。
参考答案：采煤机;刮板输送机;液压支架
Are changes in accounting principles and extraordinary items treated similarly in accordance with U.S. Generally Accepted Accounting Principles and International Financial Reporting Standards Accounting principles Extraordinary items（）①A. Yes Yes ②B. NoNo ③C. Yes No
A. ①
B. ②
C. ③
水准标尺分划面弯曲差
