设表单frmA包含命令按钮组cmgB，cmgB中包含命令按钮cmdC和cmdD，在cmdD的Click事件代码中要调用cmdC的Click事件代码，则下列调用中错误的是（）。

A:Thisform.cmgB.cmdC.Click B:This.Parent.cmdC.Click C:This.cmgB.cmdC.Click D:This.Parent.Parent.cmgB.cmdC.Click

Anterior to the root of the right lung are （）.

A:right phrenic n. B:superior vena cava C:ascending aortic a. D:right vagus n. E:right pericardiacophrenic vessels

Anterior to the root of the right lung are （）.

A:right phrenic n. B:superior vena cava C:ascending aortic a. D:right vagus n. E:right pericardiacophrenic vessels

Anterior to the root of the right lung are （）.

A:right phrenic n. B:superior vena cava C:ascending aortic a. D:right vagus n. E:right pericardiacophrenic vessels

Anterior to the root of the right lung are （）.

A:right phrenic n. B:superior vena cava C:ascending aortic a. D:right vagus n. E:right pericardiacophrenic vessels

Anterior to the root of the right lung are （）.

A:right phrenic n. B:superior vena cava C:ascending aortic a. D:right vagus n. E:right pericardiacophrenic vessels