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Questions 20 to 22 are based on the passage you have just heard.

A. It affects the growth of trees .
B. It has been increasing since the Ice Age .
C. It is determined by the chemicals in the air .
D. It follows a certain cycle .

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Passage 3 Questions23to25arebasedonthepassageyouhavejustheard.[音频]

A. Facial expression .
B. Gesture .
C. Movements of the body .
D. Non - verbal language .

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Questions23to25arebasedonthepassageyouhavejustheard.

A. Because there is large number of vocabulary .
Because the non - verbal languages are not easy to understand .
C. Because the grammar is too complicated .
D. Because there is no language learning environment .

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Questions23to25arebasedonthepassageyouhavejustheard.

A. They wil think that the child is brave .
B. They will think that the child is angry
C. They will think that the child does not respect the older people .
D. They will think that the child is uncomfortable .

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影响电泳结果的内在因素有带电粒子的、和。

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Questions 20 to 22 are based on the passage you have just heard.

A. It affects the growth of trees . B. It has been increasing since the Ice Age . C. It is determined by the chemicals in the air . D. It follows a certain cycle .

Passage 3 Questions23to25arebasedonthepassageyouhavejustheard.[音频]

Questions23to25arebasedonthepassageyouhavejustheard.

Questions23to25arebasedonthepassageyouhavejustheard.

影响电泳结果的内在因素有带电粒子的、 和 。

A. It affects the growth of trees .
B. It has been increasing since the Ice Age .
C. It is determined by the chemicals in the air .
D. It follows a certain cycle .

影响电泳结果的内在因素有带电粒子的、和。