問題詳情

     In the early 20th century the American South was ravaged by pellagra, a nasty disease that produced the“four Ds” — dermatitis,    16    , dementia and death. At first, pellagra’s nature was uncertain, but by 1915 Dr.Joseph Goldberger, a Hungarian immigrant employed by the federal government,   17   conclusively shownthat it was caused by nutritional deficiencies associated with poverty, and especially with a corn-based diet.
      However, for decades many Southern citizens and politicians refused to accept this diagnosis, declaringeither that the epidemic was a fiction created by Northerners to insult the South or    18    the nutritionaltheory was an attack on Southern culture. And deaths from pellagra continued to climb.                 Sound familiar? We’ve known for months what it takes to bring Covid-19 under control. Most advancedcountries have gone down this route. A few countries, like New Zealand and South Korea, have largely orcompletely defeated the coronavirus. But the United States is exceptional, in a very bad way. The rate of newcases never declined all that much, because falling infection rates in the New York area were   19   by flat orrising infections in the South and the West. Why? A lot of the answer is that many state governments haverushed to return to business as usual even though only a handful of states   20   federal criteria for even theinitial phase of reopening. Epidemiologists warned that premature reopening would lead to a new wave ofinfections — and they were right.
16.
(A) delicacies
(B) detour
(C) deficiency
(D) diarrhea

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