指示空速表是通过()。
A.感受全压、静压来测量指示空速
B.感受静压、静温来测量指示空速
C.感受动压、静温来测量指示空速
参考答案:A
The famous singer and actress _____ performing in our city this week. [ ]
A. am
B. is
C. are
D. be
我国慢性腹泻最常见的病因是()
A.原因未明
B.小肠吸收不良
C.肠道肿瘤
D.炎症性肠病
E.非感染性肠病