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详细了解中国互联网的发展历史

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Listen to the recording in Test-9.2 and complete the following passage by filling in the blanks with what you hear.I imagine that every skydiver who 1 out of an airplane or every bungee jumper who jumps off a bridge experiences the same thing. Maybe we’re2 to these sports not because they’re exciting, but because they give us the3 to face our biggest fear—that someday our lives will 4. We’re the only animal that knows this, and we’re the only one that seems to need to5 for it again and again.

Fill in the gaps with words given in the box. Change the form where necessary.emotional, emptiness, intention, parachute, thrill1. If you a container, you remove its contents.2. Something that is is deliberate.3. A is a device which allows a person or item to float to safety after jumping out of an aircraft.4. I can remember theof not knowing what I would get on Christmas morning.5. Jealousy is a destructive .

综合曲线的主点有、、、、五个。

综合曲线的常数包括、、。