下列说法不正确的是( ) A.鱼类身体呈梭形,体表大多覆盖着鳞片,用鳃呼吸 B.蝌蚪生活在水中,用鳃呼吸,青蛙也只是用鳃呼吸 C.家鸽体内有气
若函数在区间上是减函数,在区间上是增函数,求实数的取值范围。
I travel a lot in my work, and what I dislike about my job is eating alone. It always makes me feel lonely to see others laughing and talking. So, room service for several nights was a better cho
I’m leaving for _____ one-year English course . A.a B.an C.\ D.the
近年来,屡屡有这样的报道:以美国为首的北约国家对伊拉克发动进攻或进行军事制裁,请问,北约成立于哪一年 ( ) A.1955年 B.1945
Go on _______ the other exercise after you have finished this one. A. to do B. doing C. with D. to be doing
阅读下面的文字,完成下面各题。 草堂 诗魂细雨蒙蒙,落叶飘飘。当我来时,又是茅屋为秋风所破的季节。老天像有意在营造一份思古幽情,像有意让
下列词语中没有错别字的一组是( ) A.苍桑 百舸 彷徨 激扬 B.峥嵘 惆怅 迷茫 长蒿 C.笙箫