下列关于有机物(a)的说法错误的是
A.a、b、c的分子式均为C8H8
B.b的所有原子可能处于同一平面
C.c的二氯代物有4种
D.a、b、c均能使溴水和酸性KMnO4溶液褪色
阅读材料,完成下列要求。
材料一 宋代比较重视培养儿童的礼仪。宋代家礼主要有冠、婚、丧、祭四大类。司马光根据古礼及民间冠礼实际情况,把 “男子二十,冠而字”改为“年十二至二十皆可冠”,朱熹将下限改为十五岁。祠堂是家训的主要实施场所,如金溪陆氏家族,“(陆)九韶以训戒之辞为韵语,晨兴,家长率众子弟谒先祠毕,击鼓诵其辞,使列听之”。儿童在家礼中得到了“洒扫应对进退”的礼仪规范训练。
——摘编自陈戍国《中国礼制史》等
材料二 宋人笔下涌现出诸多 “好孩子”形象。比如,赵令赫“幼而秀颖,自异于群儿中。或戏之,则正色俨然,笑语不妄。记识敏悟,四岁受《孝经》,六岁通《论语》,七岁能为二韵诗。丧父,哀毁如成人”。周谔“生而秀颖,十岁如成人,十四入太学,力学勤苦,登元丰二年进士第”。董仲永“幼而端谨,不为儿嬉事,便若成人”。
——摘编自周扬波《宋人的儿童观》等
( 1 ) 根据材料一、二,概括宋代培养儿童的途径。
( 2 ) 根据材料一、二并结合所学知识,分析宋人心目中 “好孩子”形象确立的原因。
(2018·浙江高考)We have all heard how time is more valuable than money, but is it __1__ to have too much time?
I __2__ back in high school I spent most of my day at school since I also __3__ a team sport. By the time I got home, I only had a few hours to do my homework, and I had to do it __4__.
When I got into college, things __5__. I suddenly found myself out of class before noon time. Because of all this __6__ time, there was no sense of __7__ to do my school work immediately. I was performing this action of waiting until it later became a __8__. Once that happened, I just kept __9__ my studying further and further back in my day. Then I got to the point where I was __10__ really late at night to get my work done.
One day I __11__ a former classmate of mine who was __12__ a lot of money running a sideline (副业). Since his regular job was __13__, I asked him why he just didn't do his sideline fulltime. He said without the job, he would __14__ have too much time and would just do what I did back in __15__. He said that if he __16__ the job, he would lose his __17__ to work and succeed.
So, try __18__ your time with other work. This is why there is a __19__ that if you want something done, ask a __20__ person to do it.
1.A.true B.fair
C.strange D.possible
2.A.remember B.admit
C.understand D.expect
3.A.watched B.loved
C.coached D.played
4.A.at last B.right away
C.of course D.as usual
5.A.happened B.repeated
C.changed D.mattered
6.A.extra B.difficult
C.valuable D.limited
7.A.duty B.achievement
C.urgency D.direction
8.A.burden B.relief
C.risk D.habit
9.A.pushing B.taking
C.setting D.calling
10.A.hanging out B.staying up
C.jogging round D.showing off
11.A.met B.helped
C.treated D.hired
12.A.raising B.wasting
C.demanding D.making
13.A.safe B.important
C.boring D.rewarding
14.A.luckily B.hardly
C.hopefully D.simply
15.A.childhood B.college
C.town D.business
16.A.quit B.found
C.accepted D.kept
17.A.heart B.chance
C.drive D.way
18.A.saving B.filling up
C.giving up D.trading
19.A.message B.story
C.saying D.fact
20.A.careful B.busy
C.reliable D.kind
在光滑桌面上将长为 的软导线两端固定,固定点的距离为
,导线通有电流 I ,处于磁感应强度大小为 B 、方向竖直向下的匀强磁场中,导线中的张力为( )
A . B .
C .
D .