The spark plug must have an insulated passageway for this high voltage to travel down to the electrode, where it can jump the gap and, from there, be conducted into engine block and grounded.
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【单选题】(1) W hy should you purchase (购买) something at our food sale? (2) F irst, we need money for our field trip to Washington, D. C. (3) Second, our food will be worth the money because it is all homemade....
【简答题】After we pay all our important bills, the money we have left over is our disposable income that we can use to buy things like vacations and jewelry.