a herd of thousands

a herd of thousands a couple tens of thousands a thousand ,thousands of ,thousand of 和thousands and thousands of 的区别与用法 herd thousands of thousands是什么意思 Many _____ trees A thousand B thousands C thousands of thousands of thousands of thousands of. ____people come to visit our country every year.A Tens of thousands of B Ten of thousands of C Ten thousands of D Ten thousands ______ people died in this war A.Two thousands B.Thousands of C.Two thousands of D.Two thousand of there are _ of visitors to Kunming. (A.tens of thousands B, about ten of thousands thousand 、thousands、thousands of区别 There are ______ monkeys on the Monkey Island.A.hundred of thousands of B.hundred of thousands of C.hundreds of thousand of D.hundreds of thousands of There are two____students in our school.A.thousands B.thousands of C.thousand of D.thousand thousands of tens of thousands of 91 ___Germans come to China every year.A>Thousands of B.Thousands C.Thousand ofD.Two thousands a herd of cows指一群母牛吗?不能泛指一群不分性别的母吗?难道牛群是跟据性别归类的?能不能说 a herd of cattle?