填空题

According to the passage, the powdered milk is made through pouring it ______.

【参考答案】

over a heated horizontal cylinder
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A．The speculations of Thales.B．The forces of electricity, magnetism, land gravity.C．Aristotle’s natural science.D．Galileo’s discoveries.
A．The speculations of Thales.
B．The forces of electricity, magnetism, land gravity.
C．Aristotle’s natural science.
D．Galileo’s discoveries.
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