two hundred,two hundred of.hundreds of的区别

是two hundred还是two-hundred two hundred thousand 是多少? 什么是two hundred thousand? ten times two hundred 为何说More than two hundred of the students have 为何说More than two hundred of the students have read the bookt hundreds of the students ha问题补充：为何说More than two hundred of the students have read the book.而不说More than hund 是TWO HUNDRED 还是 TWO HUNDREDS ? 为什么 two hundred hundred不用加s? Two hundred and nine thousand two hundred and fifty seven two hundred,two hundred of.hundreds of的区别 There are two hundred ducks.对 two hundred 提问 ( )yuan A,two hundred B,two hundreds C,hundred two -hundred-word 等于two hundred words吗 one thousand two hundred and two hundred thousand什么意思 ( )+sixty-four=two hundred Dangerous Creatures for two hundred 请从语法角度加以说明~（1）39.the medicine ________cool,clean and dry.A.must keep B.must be kept C.must be carried D.must be in49.________ his stamps he has collected are from Canada .A.two hundreds B.hundred of C.two hundred of D.two hund two hundred and twenty-two thousand two hundred and twenty-nine是多少?