D.the degree of their health concern is
45.Less - educated people report fewer days of stress possibly because .
A.they don't want to tell the truth
B.they don't want to face the truth
C.stress is to common a factor in their lives
D.their stress is more acute
C
看过电影《泰坦尼克号》的观众对冰川的印象应该比较深刻,他是怎样形成的?他们对行船有何影响?如果不熟悉,请看下文。
Icebergs are among nature's most impressive creations, and yet most people have never seen one. They come into being somewhere in faraway, freezing waters, amid thunderous noise and splashing turbulence(漩涡), which in most cases no one hears or sees. They exist only a short time and then slowly melt away just as unnoticed.
They have been called objects of complete beauty. Appearing in an endless variety of shapes, they may be dazzlingly white, or they may be glassy blue, green or purple, in light colors or in dark colors. They are graceful, stately, inspiring-in calm, sunlit seas.
But they are also called frightening and dangerous, and that they are-in the night, in the fog, and in storms. Even in clear weather one is wise to stay a safe distance away from them. Most of their main part is hidden below the water, so their underwater parts may extend out far beyond the visible top. Also, they may roll over unexpectedly, stirring the waters around them.
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