The starting air entering the cylinder begins when the piston（）<br>A:has nearly come to the TDC<br>B:has just past the TDC<br>C:has nearly come to the BDC<br>D:has just past the BDC

The starting air entering the cylinder begins when the piston（）
A:has nearly come to the TDC
B:has just past the TDC
C:has nearly come to the BDC
D:has just past the BDC

出自：海船船员证

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