下面选项中的方式不利于解决内心矛盾的是 （）

如图所示是一种水翼船，船体下安装了水翼．当船在高速航行时，水面下的水翼会使船身整体抬高离开水面，从而减小水对船的阻力．则水翼安装正确的是（　　）

复数z= $\frac{2i}{1+i}$ 的共轭复数是（   ）

14÷6=____……____   55－5=____ 

6×7=____               70＋40=____ 

140＋80=____            160－80=____ 

250－70=____            600－400=____ 

____Oh, thank you  

____It's about Spring Festival.

____And we have peanuts and sweets.

____Hello, Sam. Here's a book for you.

____Oh, I see. 

____What's Spring Festival?

____It's Chinese New Year. 

____At Spring Festival, we have a big family dinner.

____What's it about? 

____We say "Happy New Year!"