• 2021-04-14
    Wind shear is dangerous to flight safety. First, it may cause the airspeed increased and decreased. When we fly from tailwind into headwind, the airspeed will be increased and when we fly headwind into tailwind, the airspeed will be decreased. Second, it may cause the aircraft to lose altitude, so the aircraft is difficult to control.
  • 风切变危及飞行安全。第一,风切变会使空速增加或减少;如果我们从顺风飞进逆风,空速会增加;如果我们从逆风飞进顺风,空速会减小。第二,风切变可能导致飞机掉高度。所以,飞机难以控制。

    内容

    • 0

      Arterial blood pressure may be increased by() A: decreased sympathetic tone B: Venodilatation C: decreased parasympathetic tone D: decreased vasopressin hormone release E: adrenoceptor blocking drugs

    • 1

      If the economy shown in the diagram moves from position A to position B, we would know that ( ) A: the rate of unemployment increased. B: consumption goods production increased, but capital goods production decreased. C: its unemployment decreased, but at the expense of either capital or consumption good production. D: it has achieved full employment of resources.

    • 2

      词汇与结构 When aircraft are under radar control, air traffic controllers may replace some or all of these phases of the approach with radar____.

    • 3

      The money a man has may fly away when he needs it.

    • 4

      The main factors contributing to the dramatic increase in the human population in the 20th century are A: industrial revolution and modern medicine. B: increased education and new pesticides. C: increased immigration and decreased warfare. D: new agriculture methods and new food crops. E: decreased warfare and increased birth control.