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【C9】A．in whichB．with whichC．for whichD．of which

【C9】

A．in which

B．with which

C．for which

D．of which

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更多“【C9】A．in whichB．with whichC．fo…”相关的问题

第1题

【C9】A．In any caseB．In caseC．In case ofD．In this case

【C9】

A．In any case

B．In case

C．In case of

D．In this case

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第2题

【C9】A．in case ofB．on behalf ofC．for the sake ofD．because of

【C9】

A．in case of

B．on behalf of

C．for the sake of

D．because of

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第3题

【C9】A．inB．withC．onD．at

【C9】

A．in

B．with

C．on

D．at

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第4题

【C9】A．InB．OnC．ToD．At

【C9】

A．In

B．On

C．To

D．At

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第5题

【C9】A．in a wordB．by the wayC．in other wordsD．in addition

【C9】

A．in a word

B．by the way

C．in other words

D．in addition

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第6题

【C1】A．at whichB．with whichC．in whichD．to which

【C1】

A．at which

B．with which

C．in which

D．to which

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第7题

【23】A．for whichB．with whichC．at whichD．to which

【23】

A．for which

B．with which

C．at which

D．to which

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第8题

The key to the industrialization of space is the U. S. space shuttle.【C1】______it, astrona

uts will acquire a workhouse vehicle【C2】______of flying into space and returning many times. 【C3】______by reusable rockets that can lift a load of 65 000 pounds, the shuttle will carry devices for scientific inquiry, as well as a variety of military hardware. 【C4】______more significantly, it will deliver materials and machines into space for industrial purposes【C5】______two decades ago when "sputnik" (artificial satellite) was added to the vocabulary. In short, the【C6】______importance of the shuttle lies in its promise as an economic tool. What makes the space shuttle【C7】______is that it takes off like a rocket but lands like an air-plane. 【C8】______when it has accomplished its mission, it can be ready for【C9】______trip in about two weeks. The space shuttle, the worlds first true spaceship, is a magnificent step【C10】______making the impossible possible for the benefit and survival of man.

【C1】

A．In

B．On

C．By

D．With

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第9题

The difference between a liquid and a gas is obvious【C1】______the conditions of temperatur

e and pressure commonly found【C2】______of the Earth. A liquid can be kept in an open container and【C3】______it to the level of a free surface. A gas forms no free surface but【C4】______to diffuse throughout the space available; it must【C5】______be kept in a closed container, as【C6】______a planet's atmosphere. The distinction was a【C7】______feature of early theories【C8】______the phases of matter. In the nineteenth century, for example, one theory maintained that a liquid could be "dissolved" in a vapor without losing its identity, and another theory held that the two phases are【C9】______different kinds of molecules(分子). The theories now prevailing【C10】______a quite different approach by emphasizing.【C11】______liquids and gases have in common. They are both forms of matter that have no permanent structure, and they both【C12】______easily. They are fluids.

The【C13】______similarity of liquids and gases becomes clearly apparent when the temperature and pressure are raised somewhat.【C14】______a closed container partially filled with a liquid is heated. The liquid expands, or【C15】______, becomes less dense; some of it evaporates.【C16】______, the vapor above the liquid surface becomes denser as the evaporated molecules are【C17】______it. The combination of temperature and pressure【C18】______the densities become equal is【C19】______the critical point. Above the critical point the liquid and the gas can no longer be【C20】______; there is a single, undifferentiated fluid phase of uniform. density.

【C1】

A．in

B．on

C．under

D．beyond

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