【简答题】Dafforn considers the discovery of the toxic chemicals in the trenches disturbing because ______. PASSAGE PASSAGE PASSAGE The Mariana Trench(马里亚纳海沟) in the northern Pacific is the deepest part of the ...
【单选题】Dafforn considers the discovery of the toxic chemicals in the trenches disturbing because ______. PASSAGE The Mariana Trench(马里亚纳海沟) in the northern Pacific is the deepest part of the world's oceans. ...
A.
we are paying little attention to the impacts of sea exploration
B.
we can't foresee how long the chemicals will influence our life
C.
we have no idea about the source of the high levels of toxic chemicals
D.
we don't know completely what impacts the chemicals may bring to us