牙纵折后最明显的症状是()
A.牙伸长感
B.咀嚼痛
C.牙叩痛
D.冷刺激痛
E.热刺激痛
参考答案:B
_________that Marie was able to set up new branches elsewhere. [ ]
A. So successful her business was
B. So successful was her business
C. So her business was successful
D. So was her successful business
为了保证柴油机曲轴停在任何位置都能用压缩空气启动,则必须()。
A.二冲程柴油机应不少于6个缸
B.二冲程柴油机应不少于3个缸
C.四冲程柴油机应不少于6个缸
D.四冲程柴油机应不少于4个缸