在飞行计划(FPL)电报中,巡航速度一项以“M”为开始,其计量单位是().
A.公里/小时;
B.1%马赫数;
C,海里/小时.
参考答案:B
血中还原红蛋白至少达多少时,皮肤黏膜可出现发绀()。
A.>70g/L
B.>65g/L
C.>60g/L
D.>55g/L
E.>50g/L
The Internet plays _______ an important part in our society _______ it has influenced our life.
A.such; as
B.so; that
C.so; as
D.such; that