呼吸性酸中毒首要的治疗原则是（）.
A.解除肺不张
B.使用抗生素控制肺部感染
C.改善通气功能
D.静脉注射碱性药物
E.气管切开
参考答案：C
Though severely ____, the band insisted on playing their music late at night as usual. [ ]
A. being criticized
B. criticizing
C. criticized
D. to be criticized
下列的颜色中，（）是非彩色类。
A．红
B．灰
C．黄
D．黑
E．白
