关于分泌性中耳炎的治疗,正确的是()。
A.抗生素和糖皮质激素口服
B.鼓膜穿刺抽液
C.咽鼓管吹张
D.鼓室置管
E.鼓膜切开术
参考答案:A, B, C, D, E
According to a new study by a British’s university , learning ______ second language can lead to ________ increase in your brain power.
A.a ; the
B.不填;the
C.a ;an
D.the ;an
高炉和热风炉同时断电时应首先管道内通蒸汽,再关()。
A.热风阀
B.混风阀
C.冷风阀