题目内容

2) The Internet is also a great 1._ for children’s education. They can find 2._ they need for their schoolwork from the Internet, and they don’t have to go to 3._ 4.______ to get this information.

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3) The Internet is not the enemy; it is a 1.____ to a big, 2._ 3.______.

煤粉具有易流动性。

A. 对
B. 错

煤粉只有易燃性没有爆炸性。

A. 对
B. 错

标准煤的发热量是7000Kcal/Kg.

A. 对
B. 错