已知sinα+2cos(5π2+α)cos(π-α)-sin(π2-α)=-14

题型:解答题

问题:

已知
sinα+2cos(
2
+α)
cos(π-α)-sin(
π
2
-α)
=-
1
4

(1)求tanα的值;
(2)求(sinα+cosα)2的值.
考点:同角三角函数的基本关系式已知三角函数值求角三角函数的诱导公式
题型:解答题

阅读短文,按要求完成短文后的各项任务。

Because earthquakes happen without warning, it’s important to take steps now to prepare. Because you don’t know where you will be when an earthquake happens, prepare some supplies for your home, workplace and car.

1. Water

A person needs 1or 2 gallons of water daily just for drinking. (1)So store        

       1 gallon of water per person every day and be prepared for a 72-hour period. It is suggested that you buy bottled water. Keep bottled water in its original container and (2) do not open it until you need to use it. Also, do check the “use by” date.

2. Food

It’s always a practical idea to keep a supply of non-perishable (不易腐烂的) food on hand. Have an enough supply of canned food, powered milk, dried fruits, non-salted nuts and canned juices for at least 72 hours.

3. Flash light (手电筒) and spare batteries

Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure there are no gas leaks. Prepare a battery-powered radio and spare batteries. Most telephones will be out of order, so radios will be your best source of information.

4. Clothes

If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.

小题1:在(1)句的空白处分别填入一个适当的词使句意完整、上下文通顺。

小题2:将(2)句译成中文。

小题3:回答问题: When can we use matches or candles after an earthquake?

小题4:在文中找出与Most telephones will not be in service and radios will supply information for you.意思相同或相近的句子,并将它写在答题卡上。

小题5:在文中找出最能表达该短文主题的句子,并将它写在答题卡上。

题型:解答题

在模板的拆除技术要求中,对非承重模板,混凝土强度应达到( )MPa以上,其表面和棱角不因拆模而损坏方可拆除。

A.1.5
B.2.0
C.2.5
D.3.0

题型:解答题

在物体没有发生物态变化的前提下,下列各种说法正确的是(  )

A.温度较高的物体,所含的热量较多

B.质量相同的物体,温度较高的,所含的热量较多

C.同一物体温度较高时,所含的热量较多

D.同一物体温度升高较大时,所吸收的热量较多

题型:解答题

关于畸胎瘤下列哪项正确()

A.属良性肿瘤

B.大体呈囊状

C.不发生转移

D.实质为三个胚层来源的不同组织成分

E.只发生于卵巢、睾丸

题型:解答题

阴囊超声检查的常用体位是 ( )

A.仰卧位:为常用体位

B.站立位:隐睾、精索静脉曲张、斜疝的探测体位

C.坐位:隐睾、精索静脉曲张、斜疝的探测体位

D.A+B+C

E.A+B

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