皮皮学，免费搜题
登录
搜题
【单选题】
定向单极化基站天线采用空间分集接收的工作方式，在几乎所有场合获得良好应用，但由于性价比不如采用极化分集的双极化天线，且选址和安装极化分集天线复杂，因此，在双极化天线应用效果不理想的场合，才考虑采用空间分集接收的定向单极化基站天线。下面适合用定向单极化基站天线的是（）。A.
农村或市郊
B.
城镇、市区
C.
农村或郊野
D.
都可以
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】一条铁路线在空间的位置是用它的线路中心线来表示的，中心线点的位置是在（）中点。
【单选题】I could give an opinion __________________________, but I would rather think about it.
A.
off the sleeve
B.
off the cuffs
C.
off the cuff
D.
off the sleeves
【简答题】I would rather think of life as a good book. The further you get into it, the more it begins to come together and _________.
【简答题】I would rather think of life as a good book. The further you get into it, the more it begins to come together and ____. (get along, make sense, close in on, close up)
【单选题】患者，女，30岁。近日出现发热，微恶风，头晕，目赤，咳嗽，舌苔薄黄，脉浮数。适合选用桑叶、菊花。桑叶与菊花均有的功效是（）
A.
疏散风热，凉血止血
B.
疏散风热，清热解毒
C.
疏散风热，清肝平肝
D.
疏散风热，清肺润肺
E.
疏散风热，利咽消肿
【单选题】I don't think he meant to hurt you yesterday. I would rather he ________ .
A.
didn't say that
B.
don't say that
C.
doesn't say that
D.
hadn't said that
相关题目：
参考解析：
知识点：
题目纠错 0
发布
