[单选]
You are creating a Windows Forms application by using the .NET Framework 3.5. You use LINQ expressions to read a list of customers from the following XML file.

You need to obtain a list of names of customers who are 21 years of age or older.
Which code segment should you use？（）

A . A
B . B
C . C
D . D

配气凸轮轴的旋转是由（）驱动的，传动方式有（）传动、链条-链轮传动和（）传动。事业单位应当按照规定编制年度决算，由主管部门审核汇总后报（）审批。财政部门。审计部门。税务部门。政府部门。根据旋转方式的不同，放置式货架可分为垂直放置式货架、水平旋转式货架的个体放置式货架。哪些原因会造成电潜泵电流下降？ 2003年1月国务院转发《关于建立新型农村合作医疗制度的意见》，目前参加人数不到3亿。

You are creating a Windows Forms application by using the .NET Framework 3.5. You use LINQ expressions to read a list of customers from the following XML file.

You need to obtain a list of names of customers who are 21 years of age or older.
Which code segment should you use？（）

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[单选] You are creating a Windows Forms application by using the .NET Framework 3.5. You use LINQ expressions to read a list of customers from the following XML file. You need to obtain a list of names of customers who are 21 years of age or older. Which code segment should you use？（）

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[单选]
You are creating a Windows Forms application by using the .NET Framework 3.5. You use LINQ expressions to read a list of customers from the following XML file.

You need to obtain a list of names of customers who are 21 years of age or older.
Which code segment should you use？（）