当电码为5,云量为6,则低云量数字为()
A.5
B.6
C.7
D.8
参考答案:B
With the nuclear crisis worsening in Iran, the world's attention is fixed again on ______is called the Middle East.
A.which
B.that
C.what
D.It
()时,精密进近雷达管制员应当通知航空器复飞并说明原因。
A.航空器在五边出现危险情况
B.在有其它飞行冲突
C.在没有及时收到塔台管制员的着陆许可
D.A、B和C