---I felt left out at the party last night. ---Really? __________, you should have said something.
A.
If possible
B.
If so
C.
If necessary
D.
If any
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【单选题】Technician A says that the small gap between the piston and the cylinder wall is known as the compression ratio. Technician B says that the gap is known as piston clearance. Who is correct?
【简答题】Technician A says that the small gap between the piston and the cylinder wall is known as the compression ratio. Technician B says that the gap is known as piston clearance. Who is correct?A. Technici...