Clogged or partially obstructed exhaust ports on a diesel engine can cause()
A. over-speeding of the engine
B. failure of the engine to shut down
C. no effect of engine mounting bolts
D. high exhaust temperature
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目前,我国有多少个社会捐助接收站点()。
A. 2万多个
B. 3万多个
C. 4万多个