The 'dark side' (Lines 1-2, Paragraph 5) implies that modern agriculture will
A．have a great impact on the U.S. economy development.
B．lead to ecology pollution, if improperly controlled.
C．have to decrease the soil erosion.
D．change the DNA of conventional species.

未分类题What does the author mean by 'an apples-and-oranges—or Superman-vs.-Santa—comparison' (Para. 2)?A．It is hard to tell which one is greater as they are both outstanding.B．The comparison between Darwin and Lincoln is meaningless.C．It is difficult to compare them as they are as famous as Superman or Santa.D．There is no point comparing them because both of them are well-known to us.

未分类题【C4】A．increaseB．cut offC．raiseD．reduce

未分类题【C14】

未分类题【C15】A．other thanB．more thanC．rather thanD．better than

未分类题【C18】A．Even ifB．If onlyC．Despite thatD．Now that

判断题Eveline was not respected at the shop she worked, nor was she at home, though she was a hard-working girl.()

未分类题【C4】A．for exampleB．as a resultC．in particularD．by contrast

判断题他希望我们成功。 He hoped us success.()

未分类题【C20】

未分类题下列哪些是上海开放大学课程终结性考试的形式之一?()

未分类题Human males living with their moms may not expect to have much luck hooking up this Valentines Day.【C1】______among the northern Muriqui monkeys, males that spend the most time around their mothers seem to get a(n) 【C2】______boost when mating time rolls around. The findings,【C3】______in the Proceedings of the National Academy of Sciences USA, suggest that females in some【C4】______may have evolved to play a critical role in their sons reproductive【C5】______. Karen Strier, the papers lead author and a professor at the University of Wisconsin-Madison, says the paper '【C6】______' the socalled grandmother hypothesis, a【C7】______in which human females evolved to live past their prime reproductive years to spend more time【C8】______offspring. The research team observed and【C9】______genetic data from a group of 67 wild monkeys living in a protected reserve in Brazils Atlantic Forest: infants, mothers and possible fathers. They found that six out of the thirteen【C10】______males they studied spent more time around their mothers than would be expected by chance. These same six monkeys, on【C11】______, reproduced the greatest number of【C12】______. The investigators are still trying to【C13】______why. 'Its not until we see moms intervening and helping their sons out,' Strier says. 'Maybe【C14】______sitting near their moms, they get to see when females are【C15】______active, or maybe they just get more familiar with other【C16】______.' The findings can【C17】______with future conservation efforts for the critically【C18】______animals. Strier says, 'the【C19】______thing we would want to do is【C20】______a male out of the group where it was born.'【C1】A．ButB．WhenC．IfD．And

未分类题【C19】

未分类题【C10】

未分类题【C8】

未分类题【C9】