测量车钩中心线至轨面的垂直距离时,同一车辆两车钩中心线高度差()mm。
A.不小于10
B.不大于10
C.不小于11
D.不大于11
参考答案:B
以下四种有机物的分子式皆为C4H10O:其中既能发生消去反应生成相应的烯烃,又能氧化生成相应醛的是
A.①②
B.只有②
C.②和③
D.③和④
In relation to the Contract Law of China:
(b) state the conditions to be met for a party to be eligible for specific performance as a legal remedy for breach of contract. (4 marks)