题目

已知集合M={1，2}，N={2，3，4}，若P=M∪N，则P的子集个数为（ ） A．14   B．15   C．16   D．32 答案：C【解答】解：集合M={1，2}，N={2，3，4}， 则P=M∪N={1，2，3，4}， ∴P的子集有24=16个．Greeks play a special game at Easter and it’s good fun! The rules of the game are as follows: 1.Everyone picks out a hard-boiled Waster Egg.2.Each player finds a partner.One person will be a “holder”, and the other will be a “tapper”.Holders should hold the egg with either the pointy end or the round end facing up.Tappers should hold the egg with that same end facing down.Tapping must be done pointy-end-to-pointy-end or round-end-to-round-end.3.With one good tap, the tapper tries to crack the holder’s egg.One player will end up with a cracked egg.4.Each player finds another partner and repeats steps 2 and 3.（After one end of the egg is cracked, players may continue to play using the uncracked end）.5.A player loses when both ends of his egg have been cracked.The winner is the person who still has an uncracked egg.6.Enjoy eating the eggs!Dye your Easter eggs.With an adult’s help, dye hard-boiled eggs red using food coloring or egg dye.For a nice sheen, use a paper towel to rub some oil on each egg.But don’t use too much oil---you wouldn’t want your egg to slide out of your hand when you play the egg-cracking game!Why dye eggs red? Eggs represent new life and the red dye symbolizes the pain and suffering in the past.Why crack eggs? Some say that the cracking of the eggs symbolizes a wish to break away from human misery and enter the new life.1.A player has to drop out of the game when _____.A.the pointy end of his egg is crackedB.the round end of his egg is crackedC.his egg slides out of the handD.his egg is cracked at both ends2.Why is oil rubbed on the egg?A.To give the egg a shiny appearanceB.To make the game more difficult to playC.To protect the hand of the playerD.To symbolize the wealth of the Greeks3.Which of the following is TRUE according to the passage?A.The holders hold the eggs with the pointy end facing up in most casesB.If one end of the player’s egg is cracked, he will eat the eggC.The player in the game must dye his egg red independentlyD.It’s said that the broken eggs represent the wish to lead a new life4.Which of the following is the best title for the passage?A.The suffering of the GreeksB.The Easter holidaysC.Celebrate Greek EasterD.A special game