测量锅炉空气流量时最好使用（）。
A.靶式流量计
B.标准喷嘴
C.标准孔板
D.翼形动压管
参考答案：D
Try not to start every sentence with "the". the beginning of your sentences. [ ]
A. Vary
B. Decorate
C. Form
D. Describe
