单选题For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.Athe bottom of the column；the cylinder blocksBthe top of the column；the cylinder headsCthe top of the column；the cylinder blocksDthe bottom of the column；the cylinder heads
单选题
For Vee-form engines, （） is shaped to given two slopping surface on which （） are placed at the correct relative angle to each other.
A
the bottom of the column；the cylinder blocks
B
the top of the column；the cylinder heads
C
the top of the column；the cylinder blocks
D
the bottom of the column；the cylinder heads
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