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问题 单项选择题

某投资中心的投资额为200000元，企业要求的最，低投资利润率为15%，剩余收益为20000元，则该投资中心的投资利润率为( )。

A．35%

B．30%

C．28%

D．25%

答案

参考答案：D

解析： 由于剩余收益=投资额×(投资利润率-最低投资利润率)，即20000=200000×(投资利润率-15%)，所以，该中心的投资利润率=15%+20000/200000=255。

单项选择题

Teachers need to be aware of the emotional, intellectual, and physical changes that young adults experience. And they also need to give serious (51) to how they can be best accommodate such changes. Growing bodies need movement and (52) , but not just in ways that emphasize competition. Because they are adjusting to their new bodies and a whole host of new intellectual and emotional challenges, teenagers are especially self-conscious and need the (53) that comes from achieving success and knowing that their accomplishments are admired by others. However, the typical teenage lifestyle is already filled with so much competition that it would be (54) to plan activities in which there are more winners than losers, for example, publishing newsletters with many student-written book reviews, (55) student artwork, and sponsoring book discussion clubs. A variety of small clubs can provide multiple opportunities for leadership, as well as for practice in successful (56) dynamics. Making friends is extremely important to teenagers, and many shy students need the (57) of some kind of organization with a supportive adult (58) visible in the background.

In these activities, it is important to remember that the young teens have (59) attention spans. A variety of activities should be organized (60) participants can remain active as long as they want and then go on to something else without feeling guilty and without letting the other participants down.

58().

A.particularly 

B.barely 

C.definitely 

D.rarely
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单项选择题

高校毕业生入伍服义务兵役年限（）

A.一年

B.两年

C.三年

D.四年
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