________________(阻止) spreading.
句型训练
16It was James Watt's observation of steam from a kettle ________________ the idea of the steam engine.(birth)
正是詹姆斯·瓦特对水壶中冒出的蒸汽的观察才产生了蒸汽机的想法。
So far it remains unknown________________ last week.(break)
整个建筑化为灰烬。目前为止还不清楚上周那场火灾是怎样爆发的。
________________is why he left the country without telling anyone.(puzzle)
令我不解的是,他为什么悄悄地离开了这个国家。
________________, her parents took her to travel (cheer)
为了让她高兴起来,她的父母带她去环球旅行。
____________________________
depends on whether it can be kept secret.(successful)
这项计划是否能够成功取决于它是
能力提升
阅读理解
Washington: NASA has announced evidence that Jupiter's largest moon, Ganymede, has a saltwater ocean under its icy surface. The ocean seems to have more water than all the water on the earth's surface, according to new Hubble observation.
New Hubble observation of Ganymede's magnetic field strongly suggests that the moon, which is the largest in our whole solar system, is home to a subsurface ocean.
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