注浆速度应与盾构的（）相适应，过快可能会导致堵管，过慢则会导致地层的坍塌或使管片受力不均，产生偏压。
参考答案：掘进速度
—I regret _____ you that Mary was badly injured in the accident.
—I can hardly believe my eyes. She is always so careful.
A．informing
B．having informed
C．to inform
D．to have informed
电视新闻摄影的最高境界是______
A．“关键时刻我在场” B．“新闻摄影关心人类”C．“物质现实的复原” D．“纪实派艺术摄影”
