搜题请搜索小程序“爱下问搜题”
问题 选择题

A元素最高正价和负价绝对值之差为6，B元素次外层有8个电子，BA2在水溶液中能电离出具有相同电子层结构的两种离子，则BA2是（   ）

A．CaCl2　　

B．MgF2　　

C．NO2　　

D．CO2

答案

答案：A

判断题

节约财政支出，提高采购资金的使用效益是政府采购功能之一。( )
查看答案
单项选择题

The nurse is providing care for a client with multiple myeloma, a disorder characterized by episodes of remissions and exacerbations. Which of the following resources can best help the client adapt to the disease

A．The client's family.

B．Support group.

C．Pastoral care.

D．Hospice care.
查看答案