从报架上拿报纸看完后,你最习惯的举动是()。
A.看完就走
B.把报纸放回原处
C.把报纸整理好后放在原处
D.叫办事员来整理
参考答案:C
—What’s your sister like?
—_______.
A.She is a worker
B.She likes pears
C.She is very thin
D.She is like her father
某混合气体由一种气态烷烃和一种气态烯烃组成,在同温同压下,混合气体对氢气的相对密度为13,在标准状况下,将44.8L混合气体通入足量溴水,溴水质量增重28.0g,通过计算回答:
混合气体中气态烷烃的分子式