Once upon a time we Chinese msde the tirst kite. People used kites to send _______to other

places,because they didn't have telephones, computers,or even radios. [ ]

A. languages

B. newspapers

C. measages

D. magasines

关于药物流产，下列哪项说法不正确？（）

A.米非司酮作用于腺垂体而阻断孕酮的作用

B.米非司酮可使妊娠蜕膜变性、坏死

C.米非司酮可阻碍胚胎发育

D.内源性前列腺素可诱发宫缩

E.外源性前列腺素有溶黄体作用