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【简答题】
如图，从原点A开始，以AB＝1为直径画半圆，记为第1个半圆；以BC＝2为直径画半圆，记为第2个半圆；以CD＝4为直径画半圆，记为第3个半圆；以DE＝8为直径画半圆，记为第4个半圆；…，按此规律，继续画半圆，则第6个半圆的面积为 (结果保留π)．
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举一反三
【多选题】What is consumers’ expectation? (More than one answer)
A.
They expect their digital experience to be more human and empathic
B.
They expect their digital experience to surprise them.
C.
They expect their digital experience to allow for interactivity.
D.
They expect their digital experience to save money.
【单选题】What did the author mean by referring 'digital divide.' (Line 3, Para. 1)?
A.
Digital technology will make the gap between rich world and poor world wider.
B.
Digital technology will divide people into rich and poor world.
C.
People can be divided digitally.
D.
To divide people in digital world is wrong.
【简答题】What categories are there based on digital division?
【单选题】What would be the title for the passage?
A.
The Usage of the Digital Gadgets.
B.
The Varieties of the Digital Gadgets.
C.
Digital Gadgets: Best Products.
D.
Digital Gadgets Gain Popularity.
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