【简答题】如图所示,已知平行四边形ABCD的周长为8cm,∠B=30°,若边长AB=x(cm). (1)写出?ABCD的面积y(cm 2 )与x的函数关系式,并求自变量x的取值范围. (2)当x取什么值时,y的值最大?并求最大值.
【单选题】What will happen if a patient experiences major bleeding?
【简答题】A.Ants tap plant lice till a drop of honey comes out. B.Ants take care of plant lice. C.Ants get their food from plant. D.Ants get honey from bees.
【单选题】What will happen to adults if language tests are cancelled?
A.
They will be very happy to do what ever they want to do.
B.
They will devote themselves to business operations.
C.
They will spend more time and energy on their careers.
【简答题】如图所示,在平行四边形ABCD中,M,N分别为DC,BC的中点,已知 =c, =d,试用c,d表示 , .
【判断题】我国旅行社发展的第三阶段,国际旅行社的经营范围包括入境旅游业务、出境旅游业务。
【简答题】Stepfamilies are commonplace in the United States and their number continues to grow. While stepfamilies differ widely in their make-up, they all consist of a parenting couple and children, one or mor...
【单选题】根据旅行社服务对象和区域的不同,旅行社的经营范围包括入境旅游业务、出境旅游业务和国内旅游业务。下列属于国内旅游业务的是()。
【简答题】2 S O 2 ( g ) + O 2 ( g ) ⇌ 2 S O 3 ( g ) 1. What will happen to the equilibrium when more 2SO 2 (g) is added to the following system? 2. What will happen to the equilibrium when the volume of the sys...