氯乙烯的分子式(),氯乙烯单体简称()。
参考答案:C2H3CL;VC
下列症状中不是低血钾临床表现的是()
A.肌肉软弱无力,甚至四肢软瘫
B.腹胀、肠麻痹
C.心慌、心率快、甚至心律失常
D.尿量明显减少,出现大量蛋白及管型
E.低钾、低氯性碱中毒,可出现手足抽搐
The school finally listened to the students’repeated request that they_______a seven-day holiday on National Day
A.would spend
B.spent
C.spend
D.were going to spend