皮皮学,免费搜题
登录
搜题
【单选题】
Historians tend to tell the same joke when they are describing history education in America. It's the one【56】the teacher standing in the schoolroom door【57】goodbye to students for the summer and calling【58】them, 'By the way, we won World War H . The problem with the joke, of course, is that it's【59】funny. The recent surveys on【60】illiteracy (无知) are beginning to numb(令人震惊) : nearly one third of American 17-year-olds cannot even【61】which countries the United States【62】against in that war. One third have no【63】when the Declaration of Independence was【64】. One third thought Columbus reached the New World after 1750. Two thirds cannot correctly【65】the Civil War between 1850 and 1900.【66】when they get the answers right, some are【67】guessing. Unlike math or science, ignorance of history cannot be【68】connected to loss of international【69】But it does affect our future【70】a democratic nation and as individuals. The【71】news is that there is growing agreement【72】what is wrong with the【73】of history and what needs to be【74】to fix it. The steps are tentative (尝试性的)【75】yet to be felt in most classrooms. (56)
A.
about
B.
in
C.
for
D.
by
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【简答题】在 AaBBCC × Aabbcc 的杂交后代中, A 基因纯合的个体占的比率为 () 。
【单选题】氮气分子中的化学键是
A.
3个σ键
B.
1个σ键、2个π键
C.
2个σ键、1个π键
D.
3个π键
【单选题】阶级对立的社会,社会发展的直接动力是
A.
生产力
B.
生产关系
C.
阶级斗争
D.
经济发展
【判断题】水是醋酸和盐酸的区分性溶剂,也是硝酸和硫酸的区分性溶剂
A.
正确
B.
错误
【简答题】酸价用来测量油脂中游离酸的含量。通常以消耗( )g油中所含的酸,所需的( )之量来计量
【单选题】下列叙述错误的是(  )
A.
14 g氮气中含有7 N A 个电子(N A 代表阿伏加德罗常数)
B.
HClO和CH 2 Cl 2 分子中的化学键都是极性共价键
C.
第三周期元素的最高正化合价等于它所处的主族序数
D.
同一主族的元素的氢化物,相对分子质量越大,它的沸点一定越高
【单选题】氮气是比较稳定的气体,键能很大,氮气分子中的化学键有( )。
A.
3个 σ键
B.
2个 σ键,1个π键
C.
1个 σ键,2个π键
D.
3个π键
【单选题】在AaBBCC×Aabbcc的杂交后代中,A基因纯合的个体占的比率为( )。
A.
1
B.
3/4
C.
1/2
D.
1/4
【判断题】阶级斗争是社会基本矛盾在阶级社会中的表现,是阶级对立社会发展的直接动力。()
A.
正确
B.
错误
【简答题】在 AaBBCC×Aabbcc的杂交后代中,A基因纯合的个体占的比率为( ) ,基因型有()种 。
相关题目: