单项选择题
Put in the engine turning gear Now examine thoroughly inside the crankcase to （） that everything is correct.
A.make sure B.be sure C.assure D.believe
单项选择题 Pumps and fine filters are arranged （） with one as standby.
单项选择题 Please draw out a 0l mm shim between the two halves of the bearing （） the clearance.
单项选择题 Please draw out a 01 mm （） between the two halves of the bearing to reduce the clearance.
