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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

他惶惑地望着担架，一时竟不知如何是好了。

③惶惑

在 中， .

“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（　　）

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（　　）

连接两点的线中，（   ）最短．

下列因式分解结果正确的是（  ）

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（       ）。

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.

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（   ）

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.

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:

《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（    ）

读渭河流域区域图，回答问题。

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。

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

科技活动中，化学兴趣小组做了如下实验，请回答以下问题。

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。（   ）

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？