How is a Queen ant different from ordinary ants?
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What task do soldier ants have when the Queen is disturbed?
According to dialogue 2 in the video clip，we can learn that _______.
A. the buyer wants to buy the know-how instead of the right to use the patent
B. the buyer thinks the know-how is better than the patent
C. the know-how tells one all the details of how to manufacture the equipment
D. the price of the know-how is twice that of the patent
字符串型"4A"转换成整型是
A. 4
B. A
C. 0
布尔值true转换成字符串型是
A. 0
B. 1
C. "1"
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