肺活量是指
A．深吸气量加补呼气容积
B．深吸气量加补吸气容积
C．补吸气容积加补呼气容积
D．潮气容积加补吸气容积
E．潮气容积加补呼气容积
参考答案：A
Last weekend I went to the library __ some books on how to protect environment.[ ]
A. to borrow
B. borrow
C. borrowed
D. borrowing
反映企业某一时点财务状况的会计要素有（）。
A．资产
B．负债
C．所有者权益
D．利润
E．费用
