—What do you think of your trip to Hainan?
—Great. We were all _______ with the _______ trip.
A:pleased; pleasant
B:pleasant; pleased
C:pleasing; pleased
D:pleasant; pleasing
下列没有利用蒸发吸热这一特性的是( )
二项式(x﹣1)n的奇数项二项式系数和64,若(x﹣1)n=a0+a1(x+1)+a2(x+1)2+…+an(x+1)n,则a1等于( )
阅读下列材料,结合所学知识回答问题:MH370航班失联至今已1个多月。其间,先后至少有26个国家投入了数十艘舰船、飞机和卫星参与搜寻行动,整个范围从北半球的泰国湾、南海、马六甲海峡、安达曼海到南半球的南印度洋。如今面对重大事件,多国合作已成为主要趋势。