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2017年12月四级第二套 Part III Reading Comprehension ( 40 minutes ) Section A Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item on Answer Sheet 2 with a single line through the centre. You may not use any of the words in the bank more than once. We all know there exists great void (空白) in the public educational system when it comes to ##26## to STEM ( Science, Technology, Engineering Mathematics ) ,One educator named Dori Roberts decided to do something to change this system. Dori taught high school engineering for 11 years. She noticed there was a real void in quality stem education at all ##27## of the public educational system. she said, “I started Engineering for kids (EFK)after noticing a real lack of math, science and engineering programs to ##28## my own kids in” She decided to start an after school program where children ##29## in STEM-based competitions. The club grew quickly and when it reached 180 members and the kids in the program won several state ##30## . she decided to devote all her time to cultivating and ##31## it The global business EFK was born. Dori began operating EFK out of her Virginia home, which she then expanded to ##32## recreation centers. Today, the EFK program ##33## over 144 branches in 32 states within the United States and in 21 countries. Sales have doubled from $5 million in 2014 to $10 million in 2015,with 25 new branches planned for 2016. The EFK website states, “Our nation is not ##34## enough engineers. Our philosophy is to inspire kids at a young age to understand that engineering is a great ##35##.”
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【判断题】发电机担负调峰任务和调频任务实际上是同一概念的两种不同表述方式。()
A.
正确
B.
错误
【判断题】高蛋白饮食可使血清肌酐Scr升高。
A.
正确
B.
错误
【单选题】直流PWM变换器主电路中反并联二极管的作用是( )
A.
为电枢电流提供续流通路
B.
减少电枢电流脉动和谐波
C.
可实现四象限运行,动态反应快,无摩擦死区
D.
起整流作用
【单选题】反并联二极管作用是
A.
恒压
B.
单向导通
C.
反向截止
D.
续流
【单选题】直拉法制备大直径单晶硅的工艺流程是 。
A.
放肩 下种 引晶 装炉 等径生长 收尾拉光
B.
装炉 下种 引晶 放肩 等径生长 收尾拉光
C.
引晶 放肩 下种 装炉 等径生长 收尾拉光
D.
下种 装炉 放肩 引晶 等径生长 收尾拉光
【判断题】发电机担负调峰任务和调频任务实际上是同一概念的两种不同表述方式。
A.
正确
B.
错误
【单选题】血气分析有助于判断以下情况,除了哪一项:
A.
缺氧
B.
酸中毒
C.
呼吸衰竭
D.
喘息
【单选题】疑似消化道穿孔,观察膈下游离气体应摄()
A.
左侧卧水平投照
B.
右侧卧水平投照
C.
仰卧水平投照
D.
仰卧后前位
E.
站立后前位
【简答题】中间继电器如果有反并联二极管,作用是什么?
【判断题】高蛋白饮食可使 血清肌酐 Scr 升高。( )
A.
正确
B.
错误
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