单选题______年京师同文馆正式成立，并首次采用了编班分级的授课方式。
单选题从阅读的途径上看，阅读可分为( )。A．课上阅读和课下阅读B．书面阅读和浏览阅读C．直接阅读和间接阅读D．书面阅读、屏幕阅读和网上阅读
单选题如下图所示，阴影部分的面积是______．A．B．C．D．
单选题【2015．河南巩义】新课程理念下，教学方式、学习方式转变的基本精神是( )。
单选题教师通过记录课外活动中学生的攻击行为来研究和性别的关系，这种研究方法是( )
单选题体操动作术语中，腿从器械上面或者下面越过的动作称为______。
单选题编制课程表时，尽量将文科与理科、形象性的学科与抽象性的学科进行______。
单选题教材的设计和编写要依据美术课程总目标的要求，以阶段标准和( )为参考，确保教材设计的总体思路与课标的要求相吻合。
单选题关于理性权威与非理性权威的区别，下列描述中不恰当的是（ ）。
单选题与动摇和执拗相反的意志品质是意志的( )。
单选题若函数x∈[0，π]，则f(x)的值域为______．A．[-2，2]B．C．[-1，1]D．
单选题元代南戏四大传奇不包括______。
单选题无奖赏时能够发生的，但在有需求时才表现出来的学习过程称为______
单选题精子变形时，线粒体集中在尾基部的原因是( )A．释放顶体酶发生透明带反应B．产生能量促进精子运动C．有利于质基因进入受精卵D．受细胞核的挤压形成
单选题 The quality of drinking water in Shanghai will meet
European Union standard by 2010 and, a decade later, citizens in Shanghai will
drink the best water in the world. These were the goals set out
by the Shanghai Water Authority. With the city's population expected to increase
only slightly and the economy to boom by 2020, Chen Yin, an official with the
water authority, said Shanghai's water consumption will not increase from its
present amount. Zhang Yue, director of the Urban Construction
Division under the Ministry of Construction, said, "Shanghai is the first city
in the country to publicize these ambitions. They will not be easy to
achieve." He said water saving will help keep the sustainable
development of China's economy. Saving one cubic meter of water
means saving the city's infrastructure costs by 10,000 Yuan. Last year, Shanghai
saved 300 million cubic meters of water either from readjustment of industrial
structure or the employment of new technology. "The aim is to
arouse public awareness of the seriousness of water shortages," Chen said. "The
abundant surface water and amount of rain of the city are so misleading that
they result in improper use of water." Shanghai lacks drinkable
water. The Huangpu River, which supplies 80 percent of the city's drinkable
water, is nearing exhaustion. The city, therefore, has been
exploring new sources from the Yangtze River and growing forests along it to
conserve quality water. Besides penning regulations, the
authority is popularizing technology among the public to efficiently cut the
amount of water used. At present, the city has 600,000 family
toilets, each using 13 liters of water per flush. These are to be renovated to
use only 9 liters of water per flush. The authority is
renovating the first 200 toilets for households—at a cost of 40 Yuan
each. In three years, all the toilets will be renovated, which
saves the city nearly 15 million Yuan every year in water
conservation. Another task the city is engaged in is the
treatment of sewage to improve the water environment. At
present the city can only treat 44 percent of its daily 5.04 million tons of
waste water. To meet the total demand,27 more sewage treatment factories are to
be established with an estimated investment of 18 billion Yuan.
单选题罗马奴隶制帝国维持了近200年的全盛时期，这一时期中国处于______。
A.西汉时期
B.东汉时期
C.魏晋南北朝时期
D.隋唐时期
单选题Li-Al/FeS电池是一种正在开发的车载电池，该电池中正极的电极反应式为：2Li++FeS+。下列有关该电池的叙述，正确的是______A．Li-Al在电池中作为负极材料，该材料中Li的化合价为+1价B．该电池的电池反应式为：C．负极的电极反应式为：D．充电时，阴极发生的电极反应式为：
单选题按______分类，体育运动可分为田径运动、球类运动等。
单选题设an是公比为正数的等比数列，若a1=1，a5=16，则数列an的前7项的和为( )．A．63B．64C．127D．128
单选题关于教育在文化传承中的作用，说法错误的是______。