工具工安全操作规程规定：试压过程中，操作人员要在受压件侧翼（）m以外。
A.1
B.1.5
C.2
D.3
参考答案：D
Only when ______ the data again ______ that there was a mistake. [ ]
A. they had studied; did they realize
B. they had studied; realized they
C. had they studied; did they realize
D. had they studied; realized they
贝浩图撒谎的原因很简单，全都是用来对付（）。
