献血记录的准确使用对以下哪几点非常重要（）。A.献血者 B.输血者 C.医务人员 D

（2011年安徽巢湖，12题）某化学兴趣小组在刷洗试管时，用力过猛。造成试管

底被穿通，留下圆形小孔。在老师的启发下。兴趣小组变废为宝，将细铜丝揉成小球垫在试

管底部，配上带单孔橡皮塞的导管和烧杯，装配了一个在实验室制取气体的装置，如右图所

示。   

（1）若用此装置制取二氧化碳，在试管内的铜丝球上方应盛放块状__________ (填药品名

称。下同)， 发生反应的化学方程式 ________________________________________；若用

此装置制取氢气．在试管内的铜丝球上方应盛放__________发生反应的化学方程式

______________________________。

（2）制备气体之前，都必须要捡查装置的气密性。写出你检查该装置气密性的方法：

_________________                             _____ 。

阿托品用于全麻前给药的目的是（）

A.增强麻醉效果

B.减少麻醉药用量

C.减少呼吸道腺体分泌

D.预防心动过缓

E.辅助骨骼肌松弛

在比尔定律表达式A=ECL中，C的单位是

A．每1ml溶液中所含溶质的g数

B．每1L溶液中所含溶质的g数

C．每100ml溶液中所含溶质的g数

D．每lml溶液中所含溶质的mg数

E．每100ml溶液中所含溶质的mg数

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．strengthen

B．accommodate

C．stimulate

D．enhance

对于多元弱酸，只有Ka1／Ka2≥105时，才能进行分步滴定（