胸膜腔位于（）
A．胸壁和膈之间
B．胸膜和肺之间
C．胸壁和纵隔之间
D．肋胸膜和纵隔胸膜之间
E．壁胸膜和脏胸膜之间
参考答案：E
程序设计语言的基本成分是数据成分、运算成分、控制成分和( )。
A．对象成分
B．变量成分
C．语句成分
D．传输成分
Speaker A: I wonder what's happened to Jerry. He hasn't been around for at least two weeks.Speaker B: ______
A．Yes, two weeks halve passed before you know where you are.
B．Jerry is quite introvert. He doesn't like to let others know much about him.
C．Do you know the reason for his absence
D．He took a leave to see his mother in Europe.
