------------------------<br/>
1.<span style="font-family: 'Times New Roman';">下图表示宇宙飞船发动机内氢气和氧气燃烧生成水的微观过程。下列说法错误的是（　　）</span></div>
<div class="mst-editor-em-to-div" style="display: block; font-style: normal; text-align: center;"><img src="http://file.ewt360.com/file/1403747663413199553" width="368" height="147" /></div><br/><br/>
A.<span style="font-family: 'Times New Roman';">氢气、氧气和水都是由分子构成的</span></div><br/>
B.<span style="font-family: 'Times New Roman';">氢气和氧气燃烧生成水的过程中，分子种类发生了改变</span><br/>
C.<span style="font-family: 'Times New Roman';">氢气和氧气燃烧生成水的过程中，原子种类没有发生改变</span><br/>
D.<span style="font-family: 'Times New Roman';">氢原子和氧原子保持水的化学性质</span><br/>
++++++++++++++++++++++++++<br/>
<b>正确答案</b>: ['D']<br/>
解析:<div class="mst-editor-mce-root-block"><span style="font-family: 'Times New Roman';">A</span><span style="font-family: 'Times New Roman';">．分子可构成物质，氢气、氧气和水都是由分子构成的，</span><span style="font-family: 'Times New Roman';">A</span><span style="font-family: 'Times New Roman';">正确；</span><br /><span style="font-family: 'Times New Roman';">B</span><span style="font-family: 'Times New Roman';">．氢气和氧气燃烧的过程中，分子种类发生了改变，由反应物（氢气分子、氧气分子）变为生成物（水分子），</span><span style="font-family: 'Times New Roman';">B</span><span style="font-family: 'Times New Roman';">正确；</span><br /><span style="font-family: 'Times New Roman';">C</span><span style="font-family: 'Times New Roman';">．氢气和氧气燃烧生成水的过程中，分子被拆解成若干个原子，原子重新组合成新的分子，因此原子种类没有发生改变，</span><span style="font-family: 'Times New Roman';">C</span><span style="font-family: 'Times New Roman';">正确；</span><br /><span style="font-family: 'Times New Roman';">D</span><span style="font-family: 'Times New Roman';">． 水分子是能体现出（保持）水的化学性质的最小微粒，而氢原子、氧原子不能保持水的化学性质，</span><span style="font-family: 'Times New Roman';">D</span><span style="font-family: 'Times New Roman';">错误。</span></div><br/>
省流:[['D']]<br/>
------------------------<br/>
------------------------<br/>
2.<span style="font-family: 'Times New Roman';">水电解的过程可用下列图示表示，微粒运动变化的先后顺序是（　　）</span></div>
<div class="mst-editor-em-to-div" style="display: block; font-style: normal; text-align: center;"><img src="http://file.ewt360.com/file/1403747663413207748" width="467" height="80" /></div><br/><br/>
A.<span style="font-family: 'Times New Roman';">①②③④</span></div><br/>
B.<span style="font-family: 'Times New Roman';">④①③②</span><br/>
C.<span style="font-family: 'Times New Roman';">①③④②</span><br/>
D.<span style="font-family: 'Times New Roman';">①④③②</span><br/>
++++++++++++++++++++++++++<br/>
<b>正确答案</b>: ['D']<br/>
解析:<div class="mst-editor-mce-root-block"><span style="font-family: 'Times New Roman';">在电解水的过程中，水分子（图</span><span style="font-family: 'Times New Roman';">①</span><span style="font-family: 'Times New Roman';">）变成了单个的氢原子与单个的氧原子（图</span><span style="font-family: 'Times New Roman';">④</span><span style="font-family: 'Times New Roman';">）；之后氢原子两两结合，变成了氢气分子；氧原子也两两结合，变成了氧气分子（图</span><span style="font-family: 'Times New Roman';">③</span><span style="font-family: 'Times New Roman';">、图</span><span style="font-family: 'Times New Roman';">②</span><span style="font-family: 'Times New Roman';">）。故答案为</span><span style="font-family: 'Times New Roman';">D</span><span style="font-family: 'Times New Roman';">。</span></div><br/>
省流:[['D']]<br/>
------------------------<br/>