227 The protective insulation for the exhaust pipe on a motorcycle
(A)does not need to be installed because it does not affect vehicle
performances
(B)can either be installed or not
installed
(C)should be installed to avoid burning other people.
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統計: A(0), B(0), C(2), D(0), E(0) #2215715
統計: A(0), B(0), C(2), D(0), E(0) #2215715