【单选题】飞机高速飞行中对飞行影响最大的阻力是( )
【简答题】选择方框中词的适当形式填空。(5分) 小题1:His face seems very ______ to me, but I can’t recognize him. 小题2:The meeting ______ for 3 hours and many people got bored. 小题3:The doctor asked the man to eat ______ because his...
【多选题】温度对飞行的影响中,下列哪种说法是正确的?( )
A.
气温高低影响飞机滑跑距离,气温高时,空气密度小,使发动机推力或螺旋桨拉力减小,飞机增速慢。
B.
气温高时,空气密度小,阻力大,飞机减速慢,滑跑距离增加。
C.
飞机在超音速和低速飞行时,气温升高,平飞最大速度则会减小。
D.
夜间温度降低,低层常常出现逆温,这是形成雾和烟幕的有利条件,雾和烟幕使飞机能见度变坏。
【简答题】翻译以下短语并完成句子。 1) recognize... as 2) recognize sb. /sth. to be _ 3) recognize that should+do_ 4)I_____Peter by his appearance although I hadn't seen him for 10 years.虽然我有10年没见彼得了,但是我还是凭 他的外貌认出了他。 5) ...
【单选题】请从下列单词中选择一个合适的单词填到相应的空中,你不必改变单词的词性,每个单词只能使用一次。你可以填单词,也可以填单词的字母代号。
J.
work Sara Robbins is a newsreader on the radio. Many people don’t recognize her face, but everybody knows her 1. ________. Sara’s day usually starts when most people are asleep. Her alarm clock normally goes off at 3 am and she needs to be at the studios at four. “The 2. ________ are always very quiet at that time and I get to work very quickly.” At 6 am Sara says “Good morning” to her 3. _________. The program lasts for three hours. “After the program we have a short 4.________ to talk about the next day and then we have a long, slow breakfast!” Sara never goes back home after 5._______. “I really need to relax after the program. I almost always do some sport and sometimes I meet up with a friend.” Sara doesn’t often go out in the evenings 6. ______ the week. She prefers to stay at home. She loves cooking and hardly ever eats out in 7. _______. “I don’t really have the time.” At weekends, her life is quite 8. ________. She often goes away for the weekend. “I love going to Rome or Paris or New York.” She loves the 9. ________ and art galleries, and says that “the 10. ________ is great!”
【单选题】获取一个不包含路径的文件名的方法为
C.
String getAbslutePath( )
【单选题】File类获取一个不包含路径的文件名的方法为
C.
String getAbslutePath( )