“SPEEDBRAKE DO NOT ARM”和“SPEEDBRAKE ARMED”灯是受以下哪个部件控制的()

— Hi! How do you do, Zhang？ — _______A.How are you？B.Good afternoon.C.How do you do？

地面水（)。A、DO高，自净作用差B、DO高，自净作用好C、DO低，无自净作用D、DO不变，自净作用好E、DO低，

A: The students work hard. B:_____A．So do they.B．So they do.C．So we do.D．Neither do they.

It is quite rude to_____other people behind their backs.A．do overB．do upC．do downD．do with

Speaker A: How do you do？ Im pleased to meet you. Speaker B: ______A．How do you do？ Have a

关于优势度值（Do）与景观比例（Lp）关系的说法 正确的是（ ）。A. Do与Lp正相关B. Do