The author believes that it is important that spoken language______.
A. be learned at an early age
B. not be confused with body language
C. not be confused with written language
D. be learned in the context of a caring relationship
《国际民用航空条约》规定各缔约国可在其领空行使哪些主权？
The basic content of Lamarcks theory lies in______.
A. descendants" inheritance of certain traits
B. overthrowing the evolutionary theory of Darwin
C. environment"s biological consequences
D. the change of gene sequences
By mentioning obesity epidemic, the author intends to______.
A. state the seriousness of this problem
B. prove the influence of Lamarck"s theory on people"s health
C. demonstrate experts still cannot figure out the reason for it
D. explain the genetic cause that lies in it
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