The writer of this paper combines her practices with the theory and discusses the characteristics of this object-centered teaching method and the important issues.

结合课堂教学设计实例探讨了目标导向教学的特点及运用目标导向教学应注意的问题。

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To date, balloon-borne activities have centered around heliophysics and astrophysics that have not required precision-pointing, says Near-Earth Object (NEO) program officer Rob Landis at NASA headquarters.

FORBES: Budgets Nudge NASA Toward Balloon-Based Planetary Science: First Target? Comet ISON