用元素符号表示:
(1)氮元素_______;
(2)两个铁原子____;
(3)m个氧原子______。
(1)N
(2)2Fe
(3)mO
—Did you have a good time at the party.
—Yes, we enjoyed _______ very much [ ]
A. ourselves
B. myself
C. yourself
D. yourselves
子宫内膜异位症应采用的检查是( )
A.腹腔镜检查B.子宫输卵管碘油造影检查C. * * 镜检查D.宫颈刮片检查E.诊断性刮宫检查