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A) wonder B) acquired C) consistently D) regained E) nightmare F) native G) acceptance H) effective I) hid J)prominent K) decent L) countless M) recalled N) breakthrough O) automatically When Roberto Feliz came to the USA from the Dominican Republic, he knew only a few words of English. Education soon became a (36) ________. “I could not understand anything,” he said. He (37) _______ from his teacher, came home in tears, and thought about dropping out. Then Mrs. Malave, a bilingual educator, began to work with him while teaching him math and science in his (38) ________ Spanish. “She helped me stay smart while teaching me English,” he said. Given the chance to demonstrate his ability, he (39) _______ confidence and began to succeed in school. Today, he is a (40) ________ doctor, runs his own clinic, and works with several hospitals. Every day, he uses the language and academic skills he (41) _______ through bilingual education to treat his patients. Roberto’s story is not just one of (42) ________ success stories. Research has shown that bilingual education is the most (43) __________way both to teach children English and ensure that they succeed academically. In Arizona and Texas, bilingual students (44) ________ outperform their peers in monolingual programs. Calexico, Calif, implemented bilingual education, and now has dropout rates that are less than half the state average and college (45) ________ rates of more than 90%. In ELPaso, bilingual education programs have helped raise student scores from the lowest in Texas t among the highest in the nation.
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【简答题】给出下列命题: ①过一点与已知曲线相切的直线有且只有一条;②函数 的对称中心是 ;③对任意实数a,b则 ④取一根长为3m的绳子,拉直后在任意位置剪断,那么剪得两段的长度都不少于1m的概率是 ;⑤如果△A 1 B 1 C 1 的三个内角的余弦值分别等于△A 2 B 2 C 2 的三个内角的正弦值,则△A 1 B 1 C 1 为锐角三角形,△A 2 B 2 C 2 为钝角三角形.其中真命题的序号是 (...
【简答题】定向进化按照进化对象的不同,可以分为(),()。
【单选题】( 2018• 衡阳)如图,抛物线 y=ax 2 + bx + c 与 x 轴交于点 A (- 1 , 0 ),顶点坐标( 1 , n )与 y 轴的交点在( 0 , 2 ),( 0 , 3 )之间(包含端点),则下列结论: 1 3a + b < 0 ; 2 - 1 ≤ a ≤ - ; 3 对于任意实数 m , a + b ≥ am 2 + bm 总成立; 4 关于 x 的方程 ax 2 + bx...
A.
1个
B.
2个
C.
3个
D.
4个
【单选题】分子进化的中性学说认为,决定生物进化方向的是:
A.
中性突变的逐渐积累
B.
突变的产生
C.
生存斗争
D.
自然选择
【单选题】衡量物流技术水平高低的重要指标是( )
A.
企业
B.
物流效率
C.
效率
D.
物流功能
【判断题】对于任意两个不相等的实数 a 与 b ,都有 a b ( )
A.
正确
B.
错误
【单选题】现代生物进化理论认为,决定生物进化方向的是
A.
基因重组
B.
有性生殖
C.
自然选择
D.
生物遗传
【判断题】气粉比是输送粉料的体积与输送气体的体积之比。
A.
正确
B.
错误
【判断题】对于任意两个不相等的实数a与b,都有ab
A.
正确
B.
错误
【判断题】通过基因突变技术对蛋白质进行改造可根据改造策略的不同分为定点突变和定向进化两种技术。
A.
正确
B.
错误
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