图示截取人体部位连通的三种血管的片段,其中的血液依次流经( )
要使质量分数为10%的氯化钠溶液100g 变成质量分数为20%的氯化钠溶液,可采取的方法是( )
—The plane is leaving right now, but Jim hasn't arrived yet.—Well, he said he _____here on time.