①X元素原子价电子排布式为ns²np²，且原子半径是同族元素中最小的．

②Y元素是地壳中含量最多的元素；W元素的电负性略小于Y元素，在W原子的电子排布中，p轨道上只有1个未成对电子．

③Z元素的电离能数据见表（kJ/mol）：

请回答：

A：Excuse me．____

B：Yes，I'm Brown from London．

A：How do you do? My name is Xu Fei from the Great Wall Company．

B：How do you do，Miss．Xu?

A：____

B：Thank you．Miss Xu．____

A：Glad to meet you，too．You had a good journey，didn't you?

B：Yes．____

A：I'm glad to hear that．____ Then we are going to drive to the

New Garden Hotel．

B：OK．

A．Let's take a short rest in the waiting-room．

B．I had a wonderful time during my journey．

C．Are you Mr. Brown from England?

D．It's my first time to come here．

E．I'm glad to meet you．

F．Welcome to China，Mr. Brown

下列各式的变形，能正确运用等式的性质的是（     ）