group sampling
un. 分组抽样；分层抽样
[网络] 分层采样；集体抽样；集体抽样法
热门查询
- cavitation n. [流] 气穴现象；空穴作用；成穴
- cowed n. 奶牛，母牛；母兽 vt. 威胁，恐吓
- actress n. 女演员
- Magdalen n. (=Magdalene)从良的妓女，妓女收容所
- according to prep. 根据；按照；据（…所说）；按（…所报道） [网络] 依照；根据…所说；依据
- undiscussed a. 未讨论过的, 未辩论过的
- offer vt. 提供；出价；试图 n. 提议；出价；意图；录取通知书 vi. 提议；出现；献祭；求婚
- blitzkrieg n. （德）闪电战；突然袭击
- reportorial adj. 记者的；报告的
- debra n. 黛布拉(f.)
- socioeconomically adv. socioeconomic的变形
- immunotherapy n. 免疫疗法
- micromechanics n. [力] 微观力学
- reginald n. 雷金纳德（男子名）
- miss n. 女士，小姐，年轻未婚女子 vt. 错过，想念，缺（勤）
- toady n. 谄媚者 vt. 谄媚 vi. 谄媚
- Dahl n. 达尔（人名） 达尔（地名, 在德国） 代赫勒（地名, 在沙特阿拉伯、也门）
- eve n. 前夕；傍晚；重大事件关头 n. (Eve)人名；(西)埃韦；(法)夏娃；(英)伊夫， 伊芙(女名)
- coastguard n. 海岸警备队；水上警察
- uselessness n. 无用，无效
考试词汇表
- have one's day in court
- have one's ears burning
- have one's fingers itch
- have one's garret empty
- have one's heart set on
- have one's number on it
- have one's sea sea-legs
- have one's work cut out
- have only self to thank
- have other cats to whip
- have rats in the garret
- have reservations about
- have sand in one's craw
- have sb behind the bars
- have sb in one's pocket
- have sb over the barrel
- have sb. in one's power
- have seen it all before
- have sexual intercourse
- have someone by the leg
