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结合语境,解释下列划线词语的含义。

医生有点愠怒地看了杨光一眼。

①愠怒

周副主席那浓浓的胡须绽开来,宽慰地笑了。

②宽慰

惶惑地望着担架,一时竟不知如何是好了。

③惶惑

中, .
  1. (1) 求角 的大小;
  2. (2) 设 的角平分线 ,且 ,求 的值.
“北洋舰队的覆灭不是一场战役的失败,而是那场持续数十年求索的失败。”文中“数十年求索”是指(  )

A . 鸦片战争 B . 太平天国运动 C . 戊戌变法 D . 洋务运动
美国学者米勒,模拟原始地球上的大气成分,将氢、甲烷、氨、水蒸气等放在密闭的装置中,通过火花放电,合成了(  )
A . 氨基酸 B . 葡萄糖 C . 淀粉 D . 蛋白质
连接两点的线中,(   )最短.
A . 折线 B . 射线 C . 直线段 D . 弧线
下列因式分解结果正确的是(  )
A . B . C . D .
对《囚歌》这首诗的理解有以下几种说法,挑选出一个你认为最合适的(       )。

A . 被囚禁在敌人狱中,叶挺将军多么渴望自由。 B . “我希望有一天,地下的烈火,将我连这活棺材一齐烧掉”,叶挺将军由此揭露了敌人监狱是多么黑暗。 C . 叶挺将军拒绝敌人的利诱,愿为革命而献身,表现出他坚定的信念和视死如归的大无畏精神。
D you have a rabbit?
Choose the one that fits best according to the information given in the passage you have just read.

The global energy crisis is approaching. What can we do? Here are some steps you can take.

Cooling puts the greatest stress on your summer energy bill and the power grid. Just as a tune-up for your car can improve your gas mileage, a yearly tune-up of your heating and cooling system can improve efficiency and comfort. Clean or replace filter monthly or as needed.

For central air conditioning systems and room air conditioners, look for the ENERGY STAR, the federal government's symbol for energy efficiency. For central air, purchase the system with the highest possible Seasonal Energy Efficiency Ratio. (SEER)

Use energy efficient ceiling fans either alone or with air conditioning. Ceiling fans do a great job of circulating air. When used with air conditioning, fans allow you to raise the thermostat and cut costs. Ceiling fans cool people, not rooms, so before you leave, turn off the ceiling fan.

Let a programmable thermostat "remember for you" to automatically adjust the indoor climate with your daily and weekend patterns to reduce cooling bills by up to 10 percent. You can come home to a comfortable house without wasting energy and creating pollution all day while you are at work.

Try to make your home airtight enough to increase your comfort, make your home quieter and cleaner and reduce your cooling costs up to 20 percent.

Cut your air conditioning load, and reduce pollution by planting leafy trees around your home and fixing reflective bricks on your roof.

Close blinds or shades on south-and west-facing windows during the day, or fix shading equipment to avoid heat build-up.

Turn off everything not in use: lights, TVs, computers. And use fluorescent bulbs, which provide bright, warm light while using at least two-thirds less energy, producing 70 percent less heat and lasting up to 10 times longer than incandescent bulbs.

Drive the car that gets better gas mileage whenever possible if you own more than one vehicle. If you drive 12,500 miles a year, switching 10 percent of your trips from a car that gets 20 miles per gallon to one that gets 30 mpg will save you more than £65 per year.

Carpool. The average U.S. commuter could save about £260 a year by sharing cars twice a week with two other people in a car that gets 20.1 mpg-assuming the three passengers share the cost of gas.

  1. (1) According to the passage, the thermostat is used to         .
    A . make rooms quieter B . control room temperature C . turn off the air conditioner D . reduce room air pollution
  2. (2) We can conclude from the passage that the author probably discourages          .
    A . planting leafy trees around your home B . turning off the ceiling fan before you leave your house C . keeping your south-facing windows open during the day D . using fluorescent bulbs instead of incandescent bulbs
  3. (3) According to the passage, you can save fuel by        .
    A . using energy-efficient ceiling fans B . sharing cars with others on workdays C . turning off everything not in use D . reducing 10% of your car trips every year
已知IIA元素由上至下依次是:Be、Mg、Ca、Sr、Ba、Ra;以同主族元素及其化合物性质的相似性为依据作出的下列判断不正确的(   )
A . SrO可与盐酸反应 B . Sr(OH)2难溶于水 C . SrSO4难溶于水 D . Sr(OH)2是强碱
如图,在平面直角坐标系中,直线 与坐标轴交于A、B,过线段AB的中点M作AB的垂线,交x轴于点C.

图片_x0020_100012

  1. (1) 填空:线段OB,OC,AC的数量关系是
  2. (2) 求直线CM的解析式.
They only talked about things.

他们只是谈论一些我觉得乏味的事情。

甲、乙两列完全相同的横波分别从波源A、B两点沿x轴相向传播,t=0时的波形图像如图所示,如果两列波的波速都是10m/s,求:

图片_x0020_393457081

  1. (1) 甲、乙两列波的频率各是多少
  2. (2) 第几秒末两列波相遇?相遇时C、D两点间有哪些点位移最大
《挑战不可能》是央视大型励志挑战节目,在展示选手挑战各种不可能的任务和故事的同时,重点展现“挑战自我”和“认识自我”。这启示我们(    )
A . 敢于冒险,就能创造奇迹 B . 挑战自我,可以激发自己潜能 C . 有了梦想,人生一定精彩 D . 只要努力,理想就能变成现实

读渭河流域区域图,回答问题。

  1. (1) 说出渭河谷地地质构造类型,并说明其形成过程。

  2. (2) 试分析说明渭河含沙量大的原因。

  3. (3) 描述图示地区的城市分布特征。

依次填入下列各句横线处的成语,最恰当的一句是(    )

①家住山村,山间、___________的花果不在于养眼,水中惬意游荡的鱼儿不在于怡情,而是有利于口腹之欲,这就叫“靠山吃山,靠水吃水”。

②现今生活节奏太快,灯红酒绿的城市里、___________的生活中,人们努力追求更多的物欲满足,但也有些人对亲近自然、内心宁静的生活特质充满向往。

③大年初一,海峡两岸焰火晚会在厦门、金门同时登场。厦金海域夜空中绽放着、___________的焰火,颜色各异、造型多变的焰火使得现场观众连连赞叹。

A . 五光十色  五彩缤纷  五颜六色 B . 五光十色  五颜六色  五彩缤纷 C . 五颜六色  五光十色  五彩缤纷 D . 五彩缤纷  五颜六色  五光十色

血液是反映人体健康状况的“晴雨表”,通过对血液成分的分析,可以了解身体的许多生理状况.如图是小明检查时的血涂片和化验单,有关说法正确的是(  )

医院检验科报告单(部分)


化验项目

测定值

正常参考值

RBC (红细胞)

3.8×1012个/L

(4.0~5.5)×1012个/L

WBC (白细胞)

6.8×109个/L

(4.0~10)×109个/L

Hb (血红蛋白)

85g/L

120~160g/L

PLT (血小板)

210×109个/L

(100~300)×109个/L

A . 血液由图中的①②③组成 B . 图中②能能吞噬病菌,属于人体的第一道防线 C . 图中③有细胞核,能促进止血和加速凝血 D . 根据小明的化验结果,医生建议他多吃一些含铁和蛋白质丰富的食物
科技活动中,化学兴趣小组做了如下实验,请回答以下问题。

  1. (1) 图甲所示实验可观察到A烧杯溶液变为红色,此实验不能得到的结论是(填序号)。

    ①氨分子是不断运动的

    ②氨分子有一定质量

    ③浓氨水具有挥发性

    ④氨气易溶于水

  2. (2) 图乙所示实验观察到紫色石蕊纸花变为红色,纸花变红的原因是(用化学方程式表示)。
  3. (3) 图丙所示实验中有组对比实验,其a、b实验目的是为了探究
我们中学生虽然长大了,自觉性和自控性也提高了,但是有时候难以控制自己的情绪,甚至鲁莽行事,事后又常常后悔。这是青春期_____矛盾的表现。(   )

A . 独立性与依赖性 B . 自制性和冲动性 C . 封闭性和开放性 D . 寡断性和冲动性
笑笑做实验,测得一个水龙头平均1分漏掉20克的水,这个水龙头1天会漏掉多少克的水?
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