—Did you have a good time in Thailand last year?
—________. It was too hot.
A:Oh, greatly really
B:Yes, why not.
C:Not really.
D:You're right.
在不等式2x+y﹣6<0表示的平面区域内的点是( )
stand for; every four years; take part in; as well; play an important role in; as a matter of fact; join in; compete for; be admitted as; on a regular basis
在由正数组成的等比数列{an}中,a1+a2=1,a3+a4=4,则a4+a5=( )