寡头垄断型市场是指相对少量的生产者在某种产品的生产中占据很大市场份额，从而控制了这个行业的供给的市场结构，该市场结构得以形成的原因有（）。
A.由于产品差异性的存在，生产者可以树立自己产品的信誉，从而对其产品的价格有一定的控制能力
B.这类产品通常因获得政府授予的特许专营而阻碍了其他生产者进入
C.这类行业初始投入资本较大，阻止了大量中小企业的进入
D.这类产品只有在大规模生产时才能获得好的效益，这就会在竞争中自然淘汰大量的中小企业
参考答案：C, D
解析：寡头垄断型市场是指相对少量的生产者在某种产品的生产中占据很大市场份额，从而控制了这个行业的供给的市场结构，该市场结构得以形成的原因有：这类行业初始投入资本较大，阻止了大量中小企业的进入；这类产品只有在大规模生产时才能获得好的效益，这就会在竞争中自然淘汰大量的中小企业。
| 选择最恰当的单词或词语，完成短文。 |
| Canada is one of the few 1 in the world to have two official languages: English and French. There are 10 provinces (省) in the country but only one of these —Quebec( 魁北克 ) is known as "French Canada". This is because it was founded by French explorers while British adventurers discovered and governed the rest. Canada left the British empire in 1867 to become an independent country, and English and French have been recognized as the official language ever since. |
 | Most people speak English as their first language and the two 2 television networks broadcast in English throughout the country. Apart from in Quebec and a few places on the east coast, French television is very rare. The same goes 3 traffic signs and menus, for example, Outside of Quebec, there are only a few places 4 you'll see traffic signs in French. And in restaurants, it's 5 impossible to find French on the menu unless you are in the heartland of French Canada. However, all products sold in Canada must, 6 law, have labels and instructions in both languages. |
| In Canada's English-speaking provinces, official bilingualism (双语) means that students can 7 to complete a special French course. Under this program, they are taught most of their subjects in French. |
| ( )1. A) nations ( )2. A) local ( )3. A) to ( )4. A) that ( )5. A) almost ( )6. A) in ( )7. A) choose | B) country B) individual B) on B) which B) mostly B) to B) be able to | C) land C) private C) for C) where C) hardly C) for C) like | D) place D) national D) at D) when D) really D) by D) want |
