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问题 填空题

如图是某元素的原子结构示意图，该原子的质子数为______，在化学反应中易失去______个电子．

答案

在原子结构示意图中圆圈内的数字为质子数，可知该元素原子核内有11个质子，最外层电子数为1，该元素的原子在化学反应中一般要失去1个电子而形成稳定结构．

故答案为：11；1；

单项选择题

大麻子的处方应付为（）

A．蒲公英

B．补骨脂

C．蓖麻子

D．亚麻子

E．续随子
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单项选择题

Teachers need to be aware of the emotional, intellectual, and physical changes that younga-duhs experience. And they also need to give serious (91) to how they can best (92) such changes. Growing bodies need movement and (93) , but not just in ways that emphasize competition. (94) 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 (95) that comes from achieving success and knowing that their accomplishments are (96) by others. However, the typical teenage lifestyle is already filled with so much competition that it would be (97) to plan activities in which there are more winners than losers, (98) , publishing newsletters with many student-written book reviews, (99) student artwork, and sponsoring book discussion clubs. A variety of small clubs can provide (100) opportunities for leadership, as well as for practice in successful (101) dynamics. Making friends is extremely important to teenagers, and many shy students need the (102) of some kind of organization with a supportive adult (103) visible in the background.
In these activities, it is important to remember that young teens have (104) attention spans. A variety of activities should be organized (105) participants can remain active as long as they want and then go on to (106) else without feeling guilty and without letting the other participants (107) This does not mean that adults must accept irresponsibility. (108) , they can help students acquire a sense of commitment by (109) for roles that are within their (110) and their attention spans and by having clearly stated rules.

A．durable

B．excessive

C．surplus

D．multiple
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