均质坝应使中部凸起,分别向上下游倾斜( )的坡度。
A.1%~2% B.1.5%~2%C.2%~2.5% D.2%~3%
参考答案:A
There aren’t many seats left for the concert; you had better make sure ____ two today.
A.getting
B.to have got
C.that you get
D.that you will get
关于支气管扩张主要累及的部位以下哪种描述是正确的()
A.直径>2mm中等大小的近端支气管
B.直径<2mm细小的远端支气管
C.直径>5mm中等大小的近端支气管
D.直径<5mm细小的远端支气管
E.直径>10mm中等大小的近端支气管