用水准仪望远镜筒上的准星和照门照准水准尺后，在目镜中看到图像不清晰，应该（）螺旋，若十字丝不清晰，应旋转（）螺旋。
参考答案：物镜对光；目镜对光
The boys arguing over whether to play baseball or football finally ___ by voting. [ ]
A. reached goals
B. came to terms
C. came to an end
D. gave up
国产塔底油裂化的催化裂化催化剂有哪些？
