【判断题】Hydrogen can’t result in weld cracking.
【简答题】阅读理解。 There are two methods by which hydrogen (氢) can be used to power cars. The first way is to use hydrogen to drive the engine, in much the same way as many cars use gas. The second method is to us...
【简答题】最佳诊断周期是能保证车辆的完好率____最高____而消耗的费用____最少____的诊断周期。
【单选题】将十进制数98转换成对应的二进制数是( )。
【判断题】发动机怠速时进气流量正常值如果小于正常值,则说明发动机负荷过大。
【判断题】发动机怠速时进气流量如果大于正常值,则说明进气系统存在真空泄露。
【单选题】Hydrogen can also be used as a source of energy.
A.
People are also able to use hydrogen as a fuel source.
B.
Hydrogen can also be employed as a source of fuel.
【单选题】三元催化转换器使用()为催化剂降低排气中的氮氧化合物。
【判断题】三元催化转换器的作用是在催化剂铂、铑、钯的作用下,排气中的有害成分HC和CO氧化成无害的CO2和水蒸气,而NOX则还原成无害的N2和O2,能最有效地减少废气中有害物的含量。