广东省是能源资源匮乏的省份,人均拥有常规能源储量不足30吨标煤,不到全国人均储量

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问题:

广东省是能源资源匮乏的省份,人均拥有常规能源储量不足30吨标煤,不到全国人均储量的1/20。下列说法不是解决我国能源资源匮乏战略的是(  )

A.积极利用我国的水力资源,大力发展水电

B.在技术、资金允许的前提下大力发展核电

C.大量购买国外的电力、石油及石油产品

D.在大力提倡节约能源的同时提高我国能源的利用效率

考点:能源和矿产资源的开发中国走可持续发展道路的实施途径——循环经济地域文化与城市发展
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下列关于金属钠的说法中,正确的是(  )

A.钠的还原性很强,在空气中易变质,最后变为过氧化钠

B.钠在工业上用于制氯化钠、氢氧化钠、碳酸钠等化合物

C.钠与硫酸铜溶液反应会置换出铜

D.钠与水反应时,会发生剧烈爆炸

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Do you know how to write an English letter? It is different from the Chinese letter. When we write a letter in English, we should write the date on the top of the right corner. Sometimes we write the insideaddress(信内地址)---the number of the house and the names of the street, city and country. Then we can begin the letter at the left corner. We always use words like “Dear sir”, “Dear Mr/Miss/Mrs …”to begin the writing. At the end of the letter, we usually use expressions as “Yours”, “Yours ever” or “Yours sincerely”. Then sign the writer’s name.

It is also different to write an English envelope. You should write your name and address on the top of the left corner and write the receiver’s in the middle or on the bottom of the right corner.

小题1:When we write a letter in English, we should write the date _______.

A.At the beginning of the letter

B.at the left corner

C.on the top of the right corner

D.at the end of the letter小题2:The inside address includes _______.

A.The number of the house

B.the name of the street

C.the name of the city and country

D.all of the above小题3:We always use words like “__________ ” to begin the writing.

A.Dear sir

B.Dear Mr/Miss/Mrs

C.Your sincerely

D.A and B小题4:Which of the following is TRUE according to the passage?

A.The English letter is the same as the Chinese letter.

B.You can write your name and address on the top of the left corner.

C.Writing an English envelope is the same as writing a Chinese envelope.

D.We can begin the letter at the right corner.小题5:What’s the best title for the passage?

A.How to write English letters

B.How to write Chinese letters

C.Writing letters and sending emails

D.The advantage of writing letters

题型:选择题
利用回声可以测海水的深度,已知声音在海水中传播的速度是1531 m/s,从船底发声装置向下发出的声 音,经过1.2 s后,船底的声音接收装置收到回声,那么海水的深度是

A.1832.2 m

B.3674.4 m

C.918.6 m

D.1531 m

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如图所示,用电压表测灯泡两端的电压的电路图,正确的是(  )

A.

B.

C.

D.

题型:选择题

B2C电子商务是按照以下哪个标准分类的结果()

A.主体所属关境

B.使用的网络类型

C.数字化程度

D.主体的性质

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