减压环带与密封锥面磨损综合后果是()。
A.供油量增加,喷后滴油
B.各缸供油不均匀和喷油延续角拖长
C.使柴油机工作粗暴,冒黑烟,功率不足
D.以上都是
参考答案:D
Nor lose possession of that fair thou ow’st; Nor shall death brag thou wander’st in his shade, When in eternal lines to time thou grow’st: So long as men can breathe, or eyes can see, So long lives this, and this gives life to thee. Questions:
A. Where does the poem come from Who wrote itB. What does "lines" meanC. Interpret the poem briefly.
横波斜入射到异质界面,使纵波反射角为90时的横波入射角称为(),它的大小只与第一介质的()和()有关。