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New York is one of the biggest cities in...

New York is one of the biggest cities in _______ U.S.A.

A.a B.an C.the D./

 

C 【解析】 句意:纽约是美国最大的城市之一。 考查冠词。a一个;an一个,the表特指,根据固定搭配in the U.S.A.“在美国”,所以用定冠词the,故选C。  
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The Cost of Thinking

Though humans have many differencesthey share several typical characteristics(特征),such as large brains and the ability to walk upright on two legs.

The first human characteristic is humans' large brains. Mammals(哺乳动物)weighing sixty kilos have an average(平均)brain size of 200 cm'. Modern man has a brain averaging 1200~1400 cm3. The largerthe betterUnluckilythat is not the case.

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Title: The Cost of Thinking

Two typical human

characteristics

Have

large

human

brains

Advantages

Be1.than any other animal on earth.

Downsides

The bigger our brain is, the more energy is needed.

Early humans paid for their large brains in2.:

spend more time in search of food;

their muscles grow smaller and weaker.

3.

Advantages

It's easier to find food or enemies.

Their arms throw stones and show body languages

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Downsides

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5.: Have backaches and painful necks

 

 

 

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