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在匀强磁场中,一矩形金属线框绕与磁感线垂直的轴匀速转动,如图甲所示,产生的交变电动势的图象如图乙所示,则()

    A 线框产生的交变电动势的频率为100Hz

    B 线框产生的交变电动势有效值为311V

    C t=0.01s时线框的磁通量变化率为零

    D t=0.005s时线框平面与中性面重合

读歌谣回答问题。
两只羊,不相让,独木桥上来顶撞。扑通扑通两声响,一齐掉向河中央。
从这首歌谣中我明白了___________________________________________
根据课文内容填空
1.以景感人,人更爱美。“二三月间,_________轻轻地吹拂着,毛毛细雨从天上_______下来。千万条柔柳__________了鹅黄色的嫩叶。青的草,绿的芽,各色鲜艳的花,都像赶集似的聚拢来,形成了___________的春天。”
2.以诚待人,人更真诚。“出来开门的童子告诉刘备,诸葛先生正在________午睡。刘备让童子不要惊醒先生,吩咐关羽、张飞_______________,自己轻轻地走进去,________________地站在草堂的台阶下等候。”
3.以物喻人,人更高洁。“樟树本身却有一种香气,而且这种香气能_________。即使当它___________的时候,当它已经作为木料制作成家具的时候,它的香气________________。”

化学与我们的生活息息相关.

(1)燃气热水器不能安装在浴室内,原因主要是:当可燃性气体燃烧不充分时,易生成有毒的  气体.

(2)油锅着火,最好的灭火方法是  

(3)某同学洗衣服,手抓洗衣粉放到水中时,有发热的感觉,说明洗衣粉溶于水  热量(选填“放出”或“吸收”)

(4)防毒面具中使用活性炭,这是利用了活性炭的  作用.

(5)五菱汽车是柳州汽车工业的一张名片,汽车车体钢铁涂上各种颜色的油漆除了美观外,最主要的目的是  

中国运动员刘翔在瑞士洛桑田径超级大奖赛上,以1288的成绩打破了男子110栏的世界纪录。据材料,为了向全世界证明中国人的实力,刘翔放弃了休息时间,进行着艰苦、枯燥、重复的训练。表明刘翔

A.维护国家统一的义务              B.强烈的民族自尊心和自信心

C.保守国家秘密的义务              D.维护民族团结的义务

形成风的直接原因是

       A垂直气压梯度力                 B水平气压梯度力   

C海陆热力性质差异                D地转偏向力

14.下列句子中的画横线词语古义和今义相同的一项是(           )

A古之学者必有师

B积土成山,风雨兴焉

C师不必贤于弟子

D小学而大遗

下列材料并回答问题:

材料一  科第之设,草泽望之起家,簪绂(zān fú)望之继世。孤寒失之,族馁矣;世禄失之,其族绝矣。

——王定保《唐摭(zhí)言》

材料二  唐太宗在端门看见新科进士鱼贯而出,高兴地说:天下英雄入吾彀(gòu)中矣

——王定保《唐摭言》

材料三  故吾以为明太祖制义取士,与秦焚书无异,特明巧而秦拙耳,其欲愚天下之心则一也。

——廖燕《明太祖论》

1)材料一中科第之设是指哪一制度的创立?何时创立?(4分)

2)结合材料一、二和所学知识,简述科第之设的历史作用。(4分)

3)根据材料三和所学知识,指出明代八股取士的消极影响。(2分)

 

在做探究凸透镜成像规律的实验中,某小组同学利用图甲测出了透镜的焦距后,正确安装并调节实验装置如图乙所示,在光屏上得到一个清晰的像.下列说法正确的是

A由甲图可知该透镜焦距为40cm

B乙图中成的是倒立放大的实像,符合放大镜的成像原理

C在乙图中保持凸透镜的位置不变,将蜡烛与光屏的位置互换,则成像情况符合投影仪的原理

D如果在烛焰与透镜之间放置一近视眼镜的镜片,则将光屏适当左移可得一个清晰的像

青春期发育突出的特征是(    

A. 身高突增                     B. 肺活量显著增大

C. 性发育和性成熟               D. 神经系统的功能日益完善

下面是一副对联的上联,请为它补写下联。
品读国学精粹

 如图,在三棱锥VABC中,平面VAB平面ABCVAB为等边三角形,ACBCACBCOM分别为ABVA的中点.

(1)求证:VB平面MOC

(2)求证:平面MOC平面VAB

(3)求三棱锥VABC的体积.

某同学利用“多米诺骨牌“效应,设计了如下气体制取与性质验证的组合实验。打开A中分液漏斗的活塞,很快看到E中导管口有气泡冒出,且溶液由紫色变红色。请看图回答问题:

1A中反应的化学方程式                                          B中白磷不燃烧,原因是                                                           

2CD中看到的现象分别是                                             

3)用化学方程式表示E中颜色变化的原因                                     

F装置收集气体的依据是                                                     

201635日召开的十二届全国人大四次会议到会代表近3000人,来自全国各省、自治区、直辖市、香港特别行政区、澳门特别行政区和中国人民解放军等各个选举单位,各方代表均占到一定比例。上述材料说明我国

A.民主权利的广泛性

B.民主主体的广泛性

C.人民民主的真实性

D.公民的民主权利有法律保障

A Tour City—Pompeii

Every year thousands of tourists visit Pompeii, Italy. They see the sights that Pompeii is famous for its stadium(运动场) and theatres, its shops and restaurants. The tourists do not, however, see Pompeii's people. They do not see them because Pompeii has no people. No one has lived in Pompeii for almost 2,000 years.

Once, Pompeii was a busy city of 22,000 people. It lay at the foot of Mount Vesuvius, a grasscovered volcano(火山). Mount Vesuvius had not erupted(喷发)for centuries, so the people of Pompeii felt safe. But they were not.

In August of AD 79, Mount Vesuvius erupted. The entire top of the mountain exploded,_and a huge black cloud rose into the air. Soon stones and hot ash began to fall on Pompeii. When the eruption ended two days later, Pompeii was buried under 20 feet of stones and ashes. Almost all of its people were dead.

For centuries, Pompeii lay buried under stone and ash. Then, in the year 1861, an Italian scientist named Ginseppe began to uncover Pompeii. Slowly, carefully, Ginseppe and his men dug. The city looked almost the same as it had looked in AD 79. There were streets and fountains, houses and shops. There was a stadium with 20,000 seats. Perhaps the most important of all, there were everyday objects, which tell us a great deal about the people who lived in Pompeii. Many glasses and jars had some dark blue colour in the bottom, so we know that the people of Pompeii liked wine. They liked bread too. Metal bread pans were in every bakery. In one bakery there were 81 round, flat loaves of bread—a type of bread that is still sold in Italy today. Tiny boxes filled with a dark, shiny power tell us that women liked to wear eyemakeup.

Ginseppe has died, but his work continues. Onefourth has not been uncovered yet. Scientists are still digging, still making discoveries that draw the tourists to Pompeii.

1. Why do large numbers of people come to Pompeii each year?

A. To visit the volcano.

B. To shop and eat there.

C. To watch sports and plays.

D. To see how Pompeiians lived.

2. Why had so many people remained by volcanic Mount Vesuvius?

A. The city nearly offered all kinds of fun.

B. The area produced the finest wine in Italy.

C. Few people expected the volcano to erupt again.

D. The mountain was beautiful and covered with grass.

3. Why did the city uncovered look almost the same as it had looked in AD 79?

A. Because Ginseppe and his men dug it slowly and carefully.

B. Because the city was buried alive and remained untouched.

C. Because scientists successfully rebuilt the city with everyday objects.

D. Because nobody had lived in the city ever since the volcano erupted.

4. What's the meaning of the underlined word “exploded” in the third paragraph?

A. 爆发       B. 震动       C. 倒塌       D. 爆裂

5. What do we know about the Pompeiians who lived 2,000 years ago?

A. They lived more or less the same as Italians now do.

B. They liked women wearing all kinds of makeup.

C. They enjoyed a lazy life with drinking and eating.

D. They went back to Pompeii after the eruption in AD 79.

下面的几个速度中表示平均速度的是(  )

A.子弹射出枪口时的速度是800m/s,以790m/s的速度击中目标

B.汽车从甲站行驶到乙站的速度是40km/h

C.汽车通过站牌时的速度是72km/h

D.小球第3 s末的速度是6m/s

罗马城内有架“圣梯”,凡人只要爬上去便可赎罪。一天,有人爬到中间,又突然退了下来,旁人问其原因,他说:“只要心中有信仰,就能赎罪,不必在乎表面的礼仪。”这个人是

A.马丁·路德    B.克伦威尔     C.亨利八世      D.加尔文

《歌哭悲欢里的清明节》阅读理解
选词填空(填序号)。
A.爱护 B.爱惜 C.保护
(1)我们要(________)粮食。
(2)我们都要(________)珍稀(xī)动物。
(3)我们要(________)学校的一草一木。
A.哗啦哗啦 B.吱呀 C.咚咚咚 D.咕噜咕噜
(4)他口渴了,(________)喝了一大瓶水。
(5)半夜时分,突然响起(________)的敲门声。
(6)门(________)一声开了。
(7)(________),雨不停地下着。

某蛋白质的相对分子质量为10936,肽键总数为98,已知氨基酸平均相对分子质量为127,则该蛋白质具有肽链数(  )

A1       B2       C3       D4

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