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It is safe. It is capable. It is friendly to the environment. All of the above are right.
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It is about sustainable transportation. It is about greenhouse effects. It is about environment protection. It is about air pollution.
Air and water pollution. Greenhouse effects. The use of land and other natural resources. All of the above.
YO3-体现了还原性 若Y.为短周期元素，则Y.对应的元素有2种可能 Y.可能位于ⅤA.族 Y.最外层有7个电子
positive critical negative doubtful
It should be efficient. It should be safe. It should be friendly. It should be constructive.
Yo/△-11；Y/Y-12；Y/△-11 Yo/△-11；Y/Yo-12；Y/△-11 Y/△-11；Yo/Y-12；Y/Y-12 Y/△-11；Y/Y-12；Y/Yo-12
Y 侧故障相电流等于 Yo 侧故障相电流 Y 侧故障相电流等于 Yo 侧故障相电流的 2/3 Y 侧非故障相电流等于 Yo 侧故障相电流的 1/3 Y 侧故障相电流等于 Yo 侧故障相电流的 3/2
Yo/△-11；Y/Y-12；Y/△-11 Yo/△-11;Y/Yo-12;Y/ △-11 Y/△一ll;Yo/Y-12;Y/Y-12 Y/△-11;Y/Y-12;Y/Yo-12
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