填空题

S6. In the last sentence of the passage, the phrase "these tools" refers to S6 .

【参考答案】

mathematics and physics
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填空题
S4. What fields need the serve of weather forecasting S4 .
单项选择题
A．To have a good company.B．To make them live a nice life.C．To keep away unwanted animals.D．To keep away loneliness.
A．To have a good company.
B．To make them live a nice life.
C．To keep away unwanted animals.
D．To keep away loneliness.
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