A．They can both be learnt with complete precision.B．They vary from individual to indiv
A. They can both be learnt with complete precision.
B. They vary from individual to individual.
C. Neither of them is essential to the acquisition of the English language.
D. They can hardly be imitated.
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The United States produced higher crop harvests before roads took away land and pollution
A. Y
B. N
C. NG
A．Visit his parents.B．Write a paper.C．Observe how bees build nests.D．Plan a family reu
A. Visit his parents.
B. Write a paper.
C. Observe how bees build nests.
D. Plan a family reunion.
Animals can be made to do both when the activity of certain genes is doubled.
A. Y
B. N
C. NG
A．Piano music could interfere with your reasoning ability.B．The effects of music do no
A. Piano music could interfere with your reasoning ability.
B. The effects of music do not last long.
C. The more you listen to music, the higher your test scores will be.
D. Music, whether classical or rock, helps improve your memory.
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