单项选择题
M:I don’t know what I could have done to make Bob so mad at me.W:Me,neither,but it’s likely to stay that way until you say you’re sorry.Q:What does the woman mean?()
A.Bob has also been mad at her recently.B.The man should ask Bob to apologize.C.Bob might not be really angry with the man.D.Bob will probably remain angry until the man apologizes.
单项选择题 具有灵活机动、通过少数典型单位即可取得深入翔实的统计资料的优点的调查是()。
多项选择题 数值型数据的图示包括()。
未知题型 X、Y、Z是周期表中三种相邻的元素,X和Y同周期,Y和Z同主族.这三种元素原子的最外电子层中电子数的总和是17,核内质子数的总和是31,则X、Y、Z三种元素是下列各组中的( )A.N、O、SB.O、S、PC.O、F、ClD.C、Si、P