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The existence of point defects，impurity atoms, dislocations，grain boundary may all hinder the dislocation movement, hence weaken the materials

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更多“The existence of point defects…”相关的问题

第1题

Which of the following is NOT true according to the text ______.

A．The existence of life needs a steady supply of heat and light.

B．A smaller planet would hold too much of its atmosphere.

C．Life may arise on the planet where the proper conditions exist.

D．The existence of life needs the right amount and kind of atmosphere.

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第2题

The bringing into existence of children is also a gamble because they may

A．be mentally retarded.

B．become our disappointment.

C．go against us.

D．become our opponents.

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第3题

It can be inferred from the passage that Van West notes the severe droughts which affected the Anasazi prior to the Great Drought primarily in order to

A．establish that enough food could have been grown to support the Anasazi's survival

B．argue that the Anasazi's past behavior. would indicate their likely future behavior. in the case of a Great Drought

C．suggest that the repetition of droughts was taking a cumulative toll on the fertility of the Plateau

D．argue that the evidence which points to the existence of a Great Drought may actually be related to earlier droughts

E．affirm the notion that the Great Drought may have been exponentially more severe than prior droughts

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第4题

It can be inferred from the passage that Van West notes the severe droughts which affected the Anasazi prior to the Great Drought primarily in order to

A．establish that enough food could have been grown to support the Anasazi's survival

B．argue that the Anasazi's past behavior. would indicate their likely future behavior. in the case of a Great Drought

C．suggest that the repetition of droughts was taking a cumulative toll on the fertility of the Plateau

D．argue that the evidence which points to the existence of a Great Drought may actually be related to earlier droughts

E．affirm the notion that the Great Drought may have been exponentially more severe than prior droughts

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第5题

It can be inferred from the passage that Van West notes the severe droughts which affected the Anasazi prior to the Great Drought primarily in order to

A．establish that enough food could have been grown to support the Anasazi's survival

B．argue that the Anasazi's past behavior. would indicate their likely future behavior. in the case of a Great Drought

C．suggest that the repetition of droughts was taking a cumulative toll on the fertility of the Plateau

D．argue that the evidence which points to the existence of a Great Drought may actually be related to earlier droughts

E．affirm the notion that the Great Drought may have been exponentially more severe than prior droughts

点击查看答案

第6题

It can be inferred from the passage that Van West notes the severe droughts which affected the Anasazi prior to the Great Drought primarily in order to

A．establish that enough food could have been grown to support the Anasazi's survival

B．argue that the Anasazi's past behavior. would indicate their likely future behavior. in the case of a Great Drought

C．suggest that the repetition of droughts was taking a cumulative toll on the fertility of the Plateau

D．argue that the evidence which points to the existence of a Great Drought may actually be related to earlier droughts

E．affirm the notion that the Great Drought may have been exponentially more severe than prior droughts

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第7题

The example of American Indian languages in the passage is to illustrate that ______.

A．American Indian languages are not backward

B．backward languages are borrowing from other languages

C．backward languages may possess quite complicated vocabularies

D．Western languages may also borrow from "backward" languages