题目内容
（请给出正确答案）
Subsonic flight does not produce a sonic boom, because it ______.
A．does not disturb existing pressures
B．stays behind its disturbance
C．does not produce great enough changes in pressure
D．stays ahead of its disturbance
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更多“Subsonic flight does not produ…”相关的问题
A.offered
B.delivered
C.reserved
D.entitled
A、错误
B、正确
【D1】
TRAVEL AGENT:FREEDOM TRAVEL. HOW MAY I HELP YOU？ CALLER: YES, I" D LIKE TO MAKE A FLIGHT RESERVATION FOR THE TWENTY-THIRD OF THIS MONT
H. TRAVEL AGENT:OKAY. 【D1】______ CALLER:WELL. I"M FLYING TO HELSINKI, FINLAN
D. TRAVEL AGENT:OKAY. LET ME CHECK WHAT FLIGHTS ARE AVAILABL
E. AND WHEN WILL YOU BE RETURNING？ CALLER:UH,WELL,【D2】______OH, AND I"D LIKE THE CHEAPEST FLIGHT AVAILABL
E. TRAVEL AGENT:OKAY. LET ME SE
E. UM, HM
M... CALLER: YEAH？ TRAVEL AGENT:WELL, THE PRICE FOR THE FLIGHT IS ALMOST DOUBLE THE PRICE YOU WOULD PAY IF YOU LEAVE THE DAY BEFOR
E. CALLER:WHOO. LET" S GO WITH THE CHEAPER FLIGHT.【D3】______ TRAVEL AGENT: IT" S ONLY $ 955. CALLER:ALRIGHT. WELL,【D4】______ TRAVEL AGENT:OKAY. THAT" S FLIGHT 1070 FROM SALT LAKE CITY TO NEW YORK, KENNEDY AIRPORT, TRANSFERRING TO FLIGHT 90 FROM KENNEDY TO HELSINK
I. A. BY THE WAY, HOW MUCH IS IT？
B. WHAT IS YOUR DESTINATION？
C. I"D LIKE TO CATCH A RETURN FLIGHT ON THE TWENTY-NINT
H.
D. LET" S GO WITH THAT.
T.对
F.错
A. Gate Two
B.the gate two
C.the two gate
D.Second Gate
【D4】
TRAVEL AGENT:FREEDOM TRAVEL. HOW MAY I HELP YOU？ CALLER: YES, I" D LIKE TO MAKE A FLIGHT RESERVATION FOR THE TWENTY-THIRD OF THIS MONT
H. TRAVEL AGENT:OKAY. 【D1】______ CALLER:WELL. I"M FLYING TO HELSINKI, FINLAN
D. TRAVEL AGENT:OKAY. LET ME CHECK WHAT FLIGHTS ARE AVAILABL
E. AND WHEN WILL YOU BE RETURNING？ CALLER:UH,WELL,【D2】______OH, AND I"D LIKE THE CHEAPEST FLIGHT AVAILABL
E. TRAVEL AGENT:OKAY. LET ME SE
E. UM, HM
M... CALLER: YEAH？ TRAVEL AGENT:WELL, THE PRICE FOR THE FLIGHT IS ALMOST DOUBLE THE PRICE YOU WOULD PAY IF YOU LEAVE THE DAY BEFOR
E. CALLER:WHOO. LET" S GO WITH THE CHEAPER FLIGHT.【D3】______ TRAVEL AGENT: IT" S ONLY $ 955. CALLER:ALRIGHT. WELL,【D4】______ TRAVEL AGENT:OKAY. THAT" S FLIGHT 1070 FROM SALT LAKE CITY TO NEW YORK, KENNEDY AIRPORT, TRANSFERRING TO FLIGHT 90 FROM KENNEDY TO HELSINK
I. A. BY THE WAY, HOW MUCH IS IT？
B. WHAT IS YOUR DESTINATION？
C. I"D LIKE TO CATCH A RETURN FLIGHT ON THE TWENTY-NINT
H.
D. LET" S GO WITH THAT.
Once your business being international, _____constantly will be part of your life.
A．your fly
B．your flight
C．fight
D．flying
【D3】
TRAVEL AGENT:FREEDOM TRAVEL. HOW MAY I HELP YOU？ CALLER: YES, I" D LIKE TO MAKE A FLIGHT RESERVATION FOR THE TWENTY-THIRD OF THIS MONT
H. TRAVEL AGENT:OKAY. 【D1】______ CALLER:WELL. I"M FLYING TO HELSINKI, FINLAN
D. TRAVEL AGENT:OKAY. LET ME CHECK WHAT FLIGHTS ARE AVAILABL
E. AND WHEN WILL YOU BE RETURNING？ CALLER:UH,WELL,【D2】______OH, AND I"D LIKE THE CHEAPEST FLIGHT AVAILABL
E. TRAVEL AGENT:OKAY. LET ME SE
E. UM, HM
M... CALLER: YEAH？ TRAVEL AGENT:WELL, THE PRICE FOR THE FLIGHT IS ALMOST DOUBLE THE PRICE YOU WOULD PAY IF YOU LEAVE THE DAY BEFOR
E. CALLER:WHOO. LET" S GO WITH THE CHEAPER FLIGHT.【D3】______ TRAVEL AGENT: IT" S ONLY $ 955. CALLER:ALRIGHT. WELL,【D4】______ TRAVEL AGENT:OKAY. THAT" S FLIGHT 1070 FROM SALT LAKE CITY TO NEW YORK, KENNEDY AIRPORT, TRANSFERRING TO FLIGHT 90 FROM KENNEDY TO HELSINK
I. A. BY THE WAY, HOW MUCH IS IT？
B. WHAT IS YOUR DESTINATION？
C. I"D LIKE TO CATCH A RETURN FLIGHT ON THE TWENTY-NINT
H.
D. LET" S GO WITH THAT.
This is an article ______.
A．on aviation history
B．about a man called Lindbergh and his plane
C．about a famous flight across the Atlantic
D．about how to go to Paris from New York by plane
