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【简答题】
Not enough American students want to be engineers, mathematicians, or scientists 此题出自2015年湖北宜昌中考英语真题及答案 C A. Goldie does not care about beauty or clothes B. She learned to make a machine with the blocks(积木) C. Yet girls appear far less interested in STEM subjects D. They should also provide a good education E. The four areas together are known as STEM Not enough American students want to be engineers, mathematicians, or scientists. The US government wants to change that. The government will spend three billion dollars on the education of young Americans in science, technology, engineering, and math. (66) ____________. Many jobs in the STEM fields will open in the coming years. The purpose of the government’s investment(投资)is to increase the number of Americans who can take those jobs. (67) _____________ than boys. Only 25 percent of STEM students are girls. Camsie McAdams is at the US Education Department. She says girls simply do not feel welcomed in STEM subjects. Debbie Sterling is an engineer. She invented a toy for girls. The name of the toy is “Goldie Blox”. To interest girls, Sterling created the character “Goldie”. (68) _____________. Goldie tells stories, solves difficult problems and builds new worlds. Mia is a seven-year-old girl who likes science. In her room, she has no fashion dolls. Instead, she received a set of Goldie Blox from her grandmother. (69) _____________. Experts say parents should do more than just buy toys to interest their girls in STEM subjects. (70) _____________. At school, girls should take part in projects that require teamwork and creative thinking.
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参考答案:
举一反三
【判断题】设 级数 和 ,且 ,若 收敛,则 也收敛。
A.
正确
B.
错误
【多选题】北京作为历史悠久的古都,延续下来的道路网布局属于 () ;地形起伏的山区城市如重庆,其道路网结构形式为 () 。
A.
放射环式路网
B.
自由式路网
C.
方格式路网
D.
混合式路网
【单选题】轻度高血钾引起心肌兴奋性升高的原因是
A.
细胞膜对钠的通透性增大
B.
细胞膜对钙的通透性增大
C.
细胞膜对钾的通透性减少
D.
阈电位水平下移
E.
静息电位至阈电位间距减少
【单选题】轻度高血钾引起心肌兴奋性升高的原因是
A.
静息电位绝对值减小导致距阈电位水平的差距缩小
B.
静息电位绝对值增大导致距阈电位水平的差距增大
C.
细胞膜对钾的通透性减小
D.
细胞膜对钙的通透性增大
E.
细胞膜对钠的通透性增大
【单选题】关于下述公式的解释,下列选项中哪些不正确?【图片】
A.
这是物理学中力等于动量变化速率的表达式
B.
这是包含稳态和非稳态过程的动量衡算公式
C.
第一第二个积分项目中,质量等于密度乘以流速乘以微元面积,余弦表示速度的x方向分量
D.
最后一项是控制体的动量变化率
【判断题】设 ,若 收敛,则必有 也收敛。
A.
正确
B.
错误
【简答题】产生肺回缩力的来源有___和___。
【单选题】轻度高血钾引起心肌兴奋性升高的原因是
A.
静息电位绝对值减小导致距阈电位水平的差距缩小
B.
细胞膜对钾的通透性减小
C.
细胞膜对钙的通透性增大
D.
细胞膜对钠的通透性增大
【单选题】关于自由度的概念,下面哪些说法是不正确的?
A.
自由度分析主要是在系统求解之前,确定需要给定多少个变量,使系统有唯一解;
B.
自由度的表达式为: d=n-m
C.
自由度分析可以避免由设定不足或设定过度引起方程无解
D.
自由度的概念和物理化学中的自由度概念一致
【单选题】轻度高血钾引起心肌兴奋性升高的原因是
A.
静息电位绝对值减小导致距阈电位水平的差距缩小
B.
静息电位绝对值增大导致距阈电位水平的差距增大
C.
细胞膜对钾的通透性减小
D.
细脑膜对钙的通透性增大
E.
细胞膜对钠的通透性增大
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