【导读】
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1. [单选题]The major cause of fuel pump and injection system problems is _____.
A. improper adjustments
B. contaminated fuel
C. kinked fuel lines
D. excessive engine vibration
2. [单选题]One function provided by a hydraulic accumulator is to ___.
A. provide an area where air can separate from the oil
B. provide an area to separate solid contaminants from the oil
C. act as an oil and water separator
D. absorb shocks occurring in the system
