A。本题考查样本的代表性。A 选项“representative”意为“具有代表性的”,从每个年级随机选取 20 名学生进行调查,这是一个具有代表性的样本。B 选项“unrepresentative”意为“不具有代表性的”,不符合题意。C 选项“biased”意为“有偏见的”,这里的抽样方式没有偏见。D 选项“limited”意为“有限的”,强调数...
C一In a study conducted to determine bottled water's impact in Barcelona, it was established that it is more costly both financially and ecologically when people use bottled water instead of tap water. The study found that if all residents of Barcelon a were to use bottled water, it would ...
A survey was conducted to determine how people rated the quality of programming available on television. Respondents were asked to rate the overall quality from 0 (no quality at all) to 100 (extremely good quality). The stem-and-leaf display of the data is shown below. Stem Leaves 3 2 4...
The ___ was conducted to find out how many people prefer butter. A. examination B. inspection C. survey D. analysis 相关知识点: 试题来源: 解析 C [解析] 考查名词辨析。本句意为“进行的调查是要了解多少人喜爱黄油”。survey“民意测验,民意调查”符合句意。A项的examination“检查;考试”;B项的...
This sentence is in ___. A. simple past tense B. past continuous tense C. present perfect tense D. present continuous tense 相关知识点: 试题来源: 解析 A。“was conducted”是一般过去时的被动语态,所以答案是 simple past tense。一般过去时表示过去某个时间发生的动作或存在的状态。反馈 收藏 ...
A( )survey was conducted among local families to find out the average amount of expense on their children’s education. 问题1选项 A. questionnaire B. representation C. obligation D. integration 相关知识点: 试题来源: 解析 [答案]A [解析]考查名词词义辨析。A选项questionnaire“问卷;调查表”;...
解析:细节理解题。根据第三段“...record age-related changes to human DNA,analyse blood samples collected from 13,000 people and estimate their lifespan”可知,研究通过记录与年龄相关的 DNA 的变化,和分析血液样本来预估实验者的寿命。A项意为“通过收集和分析数据”,符合题意。故正确答案为A。答案:A反...
A survey was conducted on 100 students. 80% of them said they prefer online learning. What can be concluded? A. All students prefer online learning. B. Most students prefer online learning. C. No students prefer traditional learning. D. Only a few students prefer online learning. ...
13. How was the study conducted? A. By listing benefits of mindfulness education. B. By scanning the brain to see how it controls emotions. C. By teaching different students different mindfulness skills. D. By comparing two groups of students attending different classes. ...
3.How did the speakers come to Seattle?A. By plane.B. By car.C. By train. 4.What will the speakers have for dinner today?A. Fried rice.B. Noodles.C. Steak. 5.How is Sophie feeling now?A. Confused.B. Worried.C. Disappointed. 第二节(共15小题;每小题1.5分,满分22.5分) 听下面...