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【单选题】
Just seven years ago, the Texas Legislature prescribed that all high schoolers must pass two math courses and geometry to graduate. This summer, the state reversed course, easing its【C1】______math, science, and social-studies requirements to【C2】______class time for job training. Texas legislators want to create a more【C3】______system that helps students who arent headed to four-year colleges enter the workforce. But that【C4】______carries some risks.【C5】______its true that not all students will go on to college, pulling back on college preparatory coursework has to be【C6】______carefully in a state like Texas, with its hundreds of thousands of low-income and【C7】______students. Theyre the students who would benefit from college the most. New laws in Texas, as well as in Florida, de-emphasize the math class required for【C8】______to four-year colleges. Knowledge of these subjects is considered an indicator of college readiness【C9】______the Common Core standards, which have been【C10】______by 45 states, including Florida. More than half of public-school students in both states are nonwhite and from low-income families. Its particularly【C11】______that these Hispanic and African-American students leave high school qualified to further their e-ducation—【C12】______they dont plan on doing so right away. A college【C13】______is the most important driver of social mobility. By 2020, 65 percent of all jobs will require some kind of postsecondary education according to surveys. 【C14】______speaking, Texass earlier college-prep course-work recommendations didnt fit reality.【C15】______the high bar, only about half of the states high school graduates immediately headed off to college of any kind. 'We wanted to give students and parents more flexibility, to not only be college-prepared—which I think were doing a pretty good job of—but perhaps to【C16】______that preparation to folks who may not be going to college,' Representative Jimmie Don Aycock, who【C17】______the Texas Houses Public Education Committee, says of the revision. The goal isnt to dumb down the curriculum, he says, but to let kids【C18】______a path that might not have been【C19】______to them before. The states educational system still rewards schools when students【C20】______college readiness. 【C1】
A.
special
B.
vital
C.
strict
D.
absurd
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【简答题】金属吊顶的饰面板主要是 _________ 和 ________ 两种。
【简答题】以不同利益群体(或个人)的存在和目标物的稀缺为前提的,社会上人与人、群体与群体之间。对于一个共同目标的争夺就是竞争。 根据上述定义,下列行为中不属于竞争关系的是: ( )
【判断题】经纬仪整平的目的是使水平度盘水平和仪器竖轴铅直。
A.
正确
B.
错误
【判断题】经纬仪整平的目的是使竖直度盘处于水平位置和仪器竖轴处于铅垂位置。
A.
正确
B.
错误
【单选题】现要配制pH=4.5的缓冲溶液,最理想的缓冲对是
A.
NaH2PO4- Na2HPO4 ( p K (H2PO4-)=7.21 )
B.
HAc-NaAc ( p K (HAc)=4.76 )
C.
HCOOH-HCOONa ( p K (HCOOH)=3.75 )
D.
NH3-NH4Cl ( p K (NH3)=4.75 )
【判断题】石灰岩的抗风化能力很强
A.
正确
B.
错误
【单选题】现要配制pH=4.5的缓冲溶液,最理想的缓冲对是 ( )
A.
NaH 2 PO 4 -Na 2 HPO 4 (pKa(H 2 PO 4 -)=7.21)
B.
HAc-NaAc(pKa(HAc)=4.76)
C.
HCOOH-HCOONa(pKa(HCOOH)=3.75)
D.
NH 3 -NH 4 Cl (pK(NH 3 )=4.75)
【判断题】经纬仪整平的目的是使仪器的垂直轴竖直和水平度盘居于水平位置。
A.
正确
B.
错误
【简答题】以不同利益群体(或个人)的存在和目标物的稀缺为前提的,社会上人与人、群体与群体之间,对于一个共同目标的争夺就是竞争。 根据上述定义,下列行为中不属于竞争关系的是:( )
【单选题】在较长的垂直管路中,50平方毫米以下的电线每超过( )米时,应在管口处或接线盒中加以固定。
A.
30
B.
40
C.
50
D.
60
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