某小组有3名男生,4名女生,从中任选一名学生去听讲座,则不同的选法种数是( )
A. 3
B. 4
C. 7
D. 12
某小组有5名男生,6名女生,从中任选一名学生去听讲座,则不同的选法种数是( )
A. 5
B. 7
C. 11
D. 30
Listen to the following transmissions and fill in the blank with missing words.Confirm we are being vectored to fly _______the airport for right downwind.
Listen to the following transmissions and fill in the blank with missing words.If we continue to make orbits we will ____________________by the time we land.