若有如下定义： union aa {int n； char c[9]； floa
题型：单项选择题
问题：
若有如下定义： union aa {int n； char c[9]； float x；}a，b，c； 则下列叙述中不正确的是 ( )
A．union aa是定义的共用体类型
B．a，b，c是定义的共用体类型名
C．n、c[9]和x是共用体的成员名
D．a，b，c是定义的共用体变量名
题型：单项选择题
根据对话内容，从对话前的选项中选出能填入空白处的最佳选项，并将其番号填入答题卡的相应位置。选项中有一项为多余选项。
A: Sam, what were you doing when the earthquake happened?
B: I was doing some shopping in a shopping centre at that time.
A: 小题1:
B: I felt a slight shake and then I heard a big noise.
A: What did you do when the earth started to shake?
B: 小题2: I saw many people running quickly while pieces of glass and bricks were falling down.
A: 小题3:
B: Yes, I think so.
A: How did you feel when you found yourself in danger?
B: A little afraid.
A: 小题4:
B: Yes, I did, but no one came.
A: Did you eat anything before you got help?
B: Yes, I did. 小题5:
A: Well, thank you, Sam. I hope you’ll be well soon.