Can you help me ________ the pen? It’s under the chair.A. ask for B. look for C. pick up D. put up 答案:【答案】C【解析】句意:你能帮助我捡起这个钢笔吗?它在你椅子下面。考查动词短语辨析题。A. ask for请求…;B. look for寻找;C. pick up捡起;D. put up张贴。根据句意语境,可知pick up“捡起”符合语境,故选C。
函数y=x2+x(-1≤x≤3)的值域是
[ ]
A.[0,12]
B.[-,12]
C.[,12]
D.[,12]