填空题

S4. Why don’t the rocks melt even when the temperature has reached their melting point

【参考答案】

It was due to the pressure of the rock．
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填空题
S5. Geologists think that the rock deep in the earth is_______________________.
单项选择题
A．to conquer the American continents.B．to try smokingC．to ban smoking.D．to plan seeds of tobacco.
A．to conquer the American continents.
B．to try smoking
C．to ban smoking.
D．to plan seeds of tobacco.
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