经气是由下列哪组气共同构成().
A.胃气、肾气、宗气、原气
B.宗气、营气、卫气、原气
C.宗气、胃气、原气、营气
D.营气、卫气、宗气、肾气
E.以上皆非
参考答案:B
To their surprise, Tom and his pet dog were here a moment ago are gone now.
A.that
B.who
C.which
D.those
上颌窦癌经根治性放射治疗后,可能出现的并发症,需要和肿瘤复发鉴别,下列哪种情况更应怀疑是肿瘤复发()
A.球结膜炎
B.角膜溃疡
C.颌骨坏死
D.硬腭肿块
E.鼻流清涕