—How can we help the children in the mountain village?
—We can ____ leaflets to ask people to donate money.
A：give in
B：give off
C：give up
D：give out
已知函数f（x）=cos2x+sinxcosx，x∈R．
青蛙是两栖动物，用肺呼吸，皮肤作辅助呼吸．（判断对错）
