当压力增大时，CO2在聚乙二醇二甲醚中的溶解度增大。
参考答案：对
— What are you going to do after school?
— I want to buy some ____________ for my brother. [ ]
A. Chinese book
B. story-books
C. English book
新车在行驶（）时第一次换机油。
A、600
B、1200
C、1500
D、2000
