【名词&注释】
阿托品(atropine)、救生艇(boat)、胆囊炎胆石症(cholecystitis and cholelithiasis)、硝酸甘油片(nitroglycerin tablets)、正在进行(be doing)、操纵性试验(driving test)、性胆囊炎
[单选题]Diesel engines are started by supplying into the cylinders in the appropriate sequence for the required direction.
A. cooling water
B. compressing air
C. compressed air
D. cylinder oil