高一: 语文 数学 英语 物理 化学 生物 历史 政治 地理 

高一试题

NH3加热分解为N2和H2 , 在相同条件下,测得分解后混合气体密度为分解前的 ,则氨的分解率为(   )
A . 80% B . 60% C . 50% D . 40%
将钠、镁、铝各0.3mol,分别放入100mL 1mol•L1的硫酸中,同温同压下产生的气体的体积比是(   )
A . 1:2:3 B . 6:3:2 C . 3:2:2 D . 3:1:1
—So you gave Mary your dictionary?

— ______.She said she'd return it to me when she could afford her own.

A . Not exactly. B . My pleasure. C . No doubt. D . Good idea.
CuSO4溶液对过氧化氢的分解有催化作用(2H2O2=2H2O+O2↑)。取溶质质量分数为8.5%的过氧化氢溶液20g倒入小烧杯中,向其中加入溶质质量为0.75g的CuSO4溶液10.8g,使过氧化氢完全分解。试计算:
  1. (1) 产生氧气的质量;
  2. (2) 反应后所得溶液中CuSO4的质量分数。
下列关于文化常识的表述有误的一项是(   )
A . 《登泰山记》中“乾隆三十九年”中“乾隆”是年号。年号是我国从汉朝初年开始使用的封建王朝用来纪年的一种名号,古代帝王遇到大事、要事,常常要更改年号。 B . 《赤壁赋》中“七月既望”的“既望”指农历每月的十五。“朔”指农历每月的第一天,“晦”则指最后一天。 C . 六艺经传:六经的经文和传文,六艺,指《诗》《书》《礼》《乐》《易》《春秋》六种经书。《乐》久已失传,这是沿用古代的说法。又称作六经。 D . 巫医:古代巫和医不分。巫的职业以祝寿、占卜等为主,也用药物等为人治病。
Children in our country usually go to primary school six.
我国科学家首次合成了一种过渡金属的新核素 Hf,其单质有延展性、不易被腐蚀等特点,可应用于高科技领域.185Hf可由180Hf转化而成,下列有关180Hf、185Hf说法正确的是(   )
A . 180Hf转化为185Hf是化学变化 B . 二者的核外电子数分别为108、113 C . 1mol180Hf的中子数比1mol185Hf少5NA D . 在元素周期表中的位置不同
关于x的方程x2﹣x•cosA•cosB﹣cos2  =0有一个根为1,则△ABC一定是(   )
A . 等腰三角形 B . 直角三角形 C . 锐角三角形 D . 钝角三角形
阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

    It was a very cold evening. The old man's beard was almost icy. He was waiting for a 1 across the river. The wait seemed 2. The old man sat on the ground waiting for quite a long time.

    3, he saw several horsemen coming. He watched them silently and let the first one pass by without even asking. Another passed by, and then another, till the last rider came near the old man. The old man caught the rider's 4 and said, “Sir, would you 5 giving me a ride to the other side?”

    6 his horse, the rider replied, “Of course not.” But it was so cold that the old man's body was almost 7. He could not get 8the ground. The horseman helped the old man onto his horse. He took the old man not just across the river, 9to the old man's home.

    As they 10 the old man's house, the horseman asked, “Sir, you let several other riders pass by without even asking. Then I 11 and you asked me for a ride at once. Why? 12 I had said 'no' and left you there?”

    The old man looked the rider straight in the eye, and said, “I looked 13 the eyes of the other riders. I quickly saw that they didn't 14. It would be 15 even asking them for a ride. But in your eye I saw 16. I knew that you would help me.”

    The words 17 the rider deeply. “Thank you for what you've said,” he told the old man. “I hope I will never leave others 18 simply because I'm busy, and every American citizen does 19 in my heart.”

    With that, Thomas Jefferson, the third president of the US, turned his horse around and made his 20back to the White House.

(1)
A . help    B . ride C . trip D . drive
(2)
A . useful   B . boring C . fortunate D . endless
(3)
A . Gradually B . Finally C . Sadly  D . Surprisingly
(4)
A . eyes      B . hand  C . back D . face
(5)
A . like    B . think C . offer D . mind
(6)
A . Speeding    B . Riding C . Stopping D . Leaving
(7)
A . shocked  B . stuck C . frozen D . injured
(8)
A . down     B . on C . in D . off
(9)
A . only      B . but  C . so D . then
(10)
A . neared    B . visited C . passed D . missed
(11)
A . came on    B . came in  C . came up   D . came out
(12)
A .  Even if    B . What if C . As if   D . Only if
(13)
A . out    B . for C . into D . up
(14)
A . try      B . wait C . ask D . care
(15)
A . useless     B . risky C . dangerous  D . foolish
(16)
A . bravery  B . loyalty   C . ambition D . kindness
(17)
A . attracted   B . comforted C . touched   D . occupied
(18)
A . alone    B . out C . away D . over
(19)
A . desire    B . live  C . count   D . advance
(20)
A . choice     B . living C . mind   D . way
在△ABC中,已知(a2+b2)sin(A﹣B)=(a2﹣b2)sin(A+B),则△ABC的形状(  )

A . 等腰三角形 B . 直角三角形 C . 等腰直角三角形 D . 等腰三角形或直角三角形
已知:Pb元素在化合物中有+4和+2两种价态:Pb02受热分解可生成Pb304、Pb0和O2:+4价的Pb能氧化浓盐酸生成Cl2 PbO能与浓盐酸反应但不能将其氧化.现将1.4mol Pb02加热一段时间分解得到O2和固体甲,向甲中加入足量的浓盐酸得到Cl2 . 反应生成的O2和Cl2的物质的盘之比为2:3,下列说法正确的是 (   )
A . 甲可能是Pb304和PbO的混合物 B . 整个反应过程中转移电子的总量为2.1mol C . 若甲与浓盐酸充分反应,则需要消耗HCl的总量为2.8 mol D . 甲中各物质的物质的量之比可能是n(PbO2):n(Pb304):n(PbO)=3:3:2
补写出下列句子中的空缺部分。
  1. (1) 《诗经·氓》最后一章里的“”可以看岀男女主人公年少时青梅竹马,关系非常融洽。
  2. (2) 《离骚》中“”两句对古代服饰的“上衣下裳制”有所反映。
  3. (3) 在《赤壁赋》的开头,苏轼写自己与朋友泛舟赤壁之上,朗诵《诗经·陈风》中的《月出》篇,即文中所谓“。”
将 19.5 g锌粒投入250 mL 2mol/L的硫酸溶液中,试计算:(写出计算过程)
  1. (1) 产生的氢气在标准状况下的体积;
  2. (2) 忽略溶液体积变化体积,反应后溶液中氢离子浓度是多少?
  3. (3) 要配制250 mL 2mol/L的硫酸溶液,需用质量百分数为98%,密度为1.84 g/cm3浓硫酸多少毫升?(保留三位有效数字)
Her (perform) in the play was pretty good.
Don't lose heart. You should be more confident victory!
We could see the stars through an opening in the r .
在△ABC中,sinA=sinB,则△ABC是什么三角形(   )
A . 直角三角形 B . 钝角三角形 C . 等腰三角形 D . 锐角三角形
小时候,我被告知禁止玩火柴。

When I was young, I was told that I .

选词填空

amazing /amazed

a. You'd be how much money you can save.

b. I think you are doing an job with those children.

O是△ABC所在的平面内的一点,且满足()•(+﹣2)=0,则△ABC的形状一定为(  )

A . 正三角形 B . 直角三角形 C . 等腰三角形 D . 斜三角形
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