更多"[单选题]The lines of equal wind veloci"的相关试题:
[单选题]The lines that connect points of equal temperature are called _______ .
A.isobars
B.isotherms
C.isobaths
D.isogonic lines
[单选题]The wind that changes direction sharply either horizontally or vertically is called a _______ .
A.vortex
B.convective current
C.wind shear
D.temperature inversion
[单项选择]The velocity of escape is about ______.
A. 40,200 miles per minute
B. 25,000 kilometers per hour
C. 40,200 kilometers per hour
D. 25,000 miles per minute
[单选题]The relationship between velocity n, frequency ¦ and wave length l of electric wave spread is .
A.n=l/¦
B.n=lצ
C.n=¦/l
D.n=2¦/l
[单选题]When judging the wing speed by wind sock, if the wind sock is at aclinic level, then the wind speed can be up to_______m/s.
A.5-6
B.10-12
C.15-20
D.20-25
[单项选择]xdenotes the greatest integer less than or equal to x. Isx=1
(1)x＞1
(2)x＜2
A. 条件(1)充分，但条件(2)不充分．
B. 条件(2)充分，但条件(1)不充分．
C. 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分．
D. 条件(1)充分，条件(2)也充分．
E. (E) 条件(1)和条件(2)单独都不充分，条件(1)和条件(2)联合起来也不充分．
[单项选择]This line was carrying equal number of eastbound and westbound trains, and they _________ regularly.
A. altered
B. alternated
C. switched
D. exchanged
[单项选择]She crossed the enemy lines, disguised as a civilian, to bring medical ______ to the Resistance fighters.
A. surrey
B. surcharge
C. summation
D. succor
[单项选择]He is said to be equal to any task whatever．
A. 负责
B. 胜任
C. 疲于应付
D. 同等对待
[单项选择]All other things being equal, which one of the following bonds has the greatest duration（）
A. 15-year, 8% coupon bond.
B. 5-year, 8% coupon bond.
C. 15-year, 12% coupon bond.
[单项选择]The building of the new subway lines in the city has been ______due to lack of enough in- vestment.
A. held up
B. held on
C. held out
D. held back
[单项选择]The workers finally called off the strike.
A. put off
B. ended
C. cancelled
D. participated in
[单项选择]Culture shock is called an occupational disease mainly because ______.
A. like all other diseases it has its own signs and cure
B. only those who engage in culture work suffer from it
C. it is hard to get rid of
D. only those living in a strange culture may experience it
[单项选择]Science fiction is called a literary subgenre because ______.
A. it is not important enough to be a literary genre
B. it cannot be made into a dramatic presentation
C. it shares characteristics with other types of prose fiction
D. it has its limits
[单项选择]The American Medical Association has called for the sport of boxing (拳击) to be banned.
A. forbidden
B. regulated
C. studied
D. reorganized
[单项选择]Why are some tattooists called" responsible"
[单项选择]The reductions on greenhouse gas emissions, called for in the Kyoto Treaty, turned out to be ______.
A. too dangerous for the U.S. economy
B. unrealistic for the year 2000
C. good for oil, coal and chemical companies
D. not too difficult to achieve in the U.S.
[单项选择]All else being equal, the ceiling on a floating-rate security is most likely to benefit the:（）
A. issuer if interest rates fall.
B. issuer if interest rates rise.
C. bondholder if interest rates rise.
[单选题]_______ is a deflective force that is created by the difference in rotational velocity between the equator and the poles.
A.Friction
B.Coriolis
C.Gravity
D.Pressure gradient force
