更多"{{B}}TEXT E{{/B}} Seven years ago"的相关试题:
[单项选择]
{{B}}TEXT E{{/B}}
Seven years ago, an
Environmental Protection Agency statistician stunned researchers studying the
effects of air pollution on health when he reported analyses indicating that as
many as 60, 000 U. S. residents die each year from breathing federally allowed
concentrations of airborne dust. This and subsequent studies figured prominently
in EPA’s decision last year to ratchet down the permitted concentration of
breathable particles in urban air -- and in human airways.
At
the time, many industrialists argued that they shouldn’t have to pay for better
pollution control because science had yet to suggest a plausible biological
mechanism by which breathing low concentrations of urban dust might sicken or
kill people.
Now, scientists at the University of Texas Houston
Health Science Center describe how they uncovered what they think may be one of
the basic elements of that toxicity.
On the alert for for
A. how inhaled dust harms the lungs
B. the function of Environmental Protection Agency
C. the function of human alveolar macrophages
D. studies by Environmental Protection Agency
[单项选择]Seven years ago, an Environmental Protection Agency statistician stunned researchers studying the effects of air pollution on health when he reported analyses indicating that as many as 60,000 U.S. residents die each year from breathing federally allowed concentrations of airborne dust. This and subsequent studies figured prominently in EPA’s decision last year to ratchet down the permitted concentration of breathable pm-tides in urban air -- and in human airways.This passage is mainly about ______.
A. how inhaled dust harms the lungs
B. the function of Environmental Protection Agency
C. the function of human alveolar macrophages
D. studies by Environmental Protection Agency
[简答题]Fourscore and seven years ago, our fathers brought forth upon this continent a new Nation. conceived in Liberty, and dedicated to the proposition that all men are created equal. Now, we are engaged in a great Civil War, testing whether that Nation, or any nation so conceived and so dedicated, can long endure. We are met on a great battlefield of that war. We have come to dedicate a portion of that field as a final resting place for those who gave their lives that Nation might live. It is altogether fitting and proper that we should do this.
But, in a larger sense, we cannot dedicate, we cannot consecrate, we cannot hallow this ground. The brave men, living and dead, who struggled here, have consecrated it far above our power to add or detract. The world will little note nor long remember what we say here, but it can never forget what they did here. It is for us, the living, rather to be dedicated to the great task remaining before us; that from these honored dead,
