结帐和更正错误的记账凭证可以不附原始凭证。()
参考答案:对
If it had been possible, I would have helped him, but I ______ too busy.
A.had been
B.would be
C.were
D.was
在帕金森病呼吸功能训练中,下列描述不正确的是
A.教会患者深呼吸训练
B.改善肺活量
C.强调胸式呼吸
D.强调腹式呼吸
E.提高胸廓的运动能力