题目内容

Three years ago, researchers reported that cancer ______.

A. was caused by normal cells
B. sometimes resulted from internal actions of the victim's own body
C. was a hereditary disease
D. was a form. of malignancy

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Which of the following is not identical as industrial property？

A. Trademarks.
B. Inventions.
C. Trade secrets.
D. Productive materials.

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The word "malignant" (line, 2 Para. 1 ) probably means ______.

A. contagious
B. chronic
C. virulent
D. injured

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A．onceB．neverC．sometimeD．over and over

A. once
B. never
C. sometime
D. over and over

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British scientists' demonstration implies that ______.

A. single cancer genes are harmless
B. the development of cancer is a complex process
C. a carcinogenic chemical is required for cancer to develop
D. cancer genes can cause cancer only in conjunction with a carcinogen

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Three years ago, researchers reported that cancer ______.

A. was caused by normal cells B. sometimes resulted from internal actions of the victim's own body C. was a hereditary disease D. was a form. of malignancy

Which of the following is not identical as industrial property？

The word "malignant" (line, 2 Para. 1 ) probably means ______.

A．onceB．neverC．sometimeD．over and over

British scientists' demonstration implies that ______.

A. was caused by normal cells
B. sometimes resulted from internal actions of the victim's own body
C. was a hereditary disease
D. was a form. of malignancy