( )in the earth’s crust，the rock may be subjected to temperatures high enough to melt it.

单选题

( )in the earth’s crust，the rock may be subjected to temperatures high enough to melt it.

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单选题

After Yang Liwei succeeded in circling the earth, ______ our astronauts desire to do is walk in space.

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单选题

The scientists ______ in sending Yang Liwei into outer space and bring him back to the earth.

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材料题

must wait there until the teacher tells them it is safe to go.At homeIf you are at home when the earthquake occurs,get immediately under the table in the living room or kitchen.Choose the biggest and strongest table you can find.You must not go anywhere near the window and dont go out onto the balcony（阳台）.Once the tremors have stopped,you can come out from under the table but you must leave the building straight away.You should walk down the stairs and should not use the lift一there may be a po

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填空题

The long‐awaited Hubble Space Telescope,due（ ）orbit the Earth next March,will observe some of the oldest stars in the sky.to

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