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A survey on “What apps students use to l...

    A survey on “What apps students use to learn English” was made in Class 4, Grade 9 in Xinhua Middle School. There are 100 students in this class. One fifth of them don’t learn English by app. Then according to the form below, among the students who learn English by app, __________ students use Scallops Words.

BaiCiZhan

(百词斩)

Scallops Words

(扇贝单词)

Youdao Dictionary

(有道词典)

PowerWord

(金山词霸)

50%

?

10%

15%

 

 

A.40 B.20 C.12

 

B 【解析】 句意:在新华中学9年4班展开了一个关于“学生们使用什么应用程序学习英语”的调查,班级里有100名学生,五分之一的学生不使用应用程序学习英语,根据下面的表格,在使用应用程序学习英语的学生中,20名学生用扇贝单词。 考查数词计算辨析。根据There are 100 students in this class. One fifth of them don’t learn English by app,班级里共有100名学生,五分之一不使用应用程序学习英语,即100*0.2=20,剩下的使用应用程序学习英语的学生是100-20=80。根据表格内的信息,使用百词斩50%,即80*0.5=40,使用有道词典10%,即80*0.1=8,使用金山词霸15%,即80*0.15=12,剩下使用扇贝单词:80-40-8-12=20。故选B。  
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