| For centuries, explorers have risked
their lives venturing into the unknown for reasons that were to varying degrees
economic and nationalistic. Columbus went west to look for better trade routes
to the Orient and to promote the greater glory of Spain. Lewis and Clark
journeyed into the American wilderness to find out what the U.S. had acquired
when it purchased Louisiana, and the Appolo astronauts rocketed to the moon in a
dramatic show off technological muscle during the cold war. Although their missions blended commercial and political-military imperatives, the explorers involved all accomplished some significant science simply by going where no scientists had gone before. Today Mars looms (隐约出现) as humanity’s next great terra incognita (未探明之地). And with doubtful prospects for a short-term financial return, with the cold war a A. to display their country’s military might B. to accomplish some significant science C. to find new areas for colonization D. to pursue commercial and state interests [填空题]Deciding how much risk we are prepared to put up with for better health is a (high)（）personal matter, not a decision we should remain to doctors alone.
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For years we have believed we were either healthy or sick. (55) , during the mid-90s, scientists developed a new concept called "sub-health", a status (56) health and illness. The concept of sub-health has become (57) because it has helped to explain many health problems. (58) one study, only 5. 6% of people in the overall population are actually sick, (59) the subhealthy group consists of about 60%, and the (60) population is considered healthy. (61) of one’s sub-health will help one to be alert to the underlying disease and remain healthy. Sub-health is a state in which the body is (62) turning from health to illness or from illness to health. Our bodies are actively (63) the conditions of health, sub-health and disease. Factors (64) aging, internal or external toxicity (毒性), and body or mind exhaustion may cause sub-health, but taking good care of the body can change a sub- 我来回答: 提交
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