共轭效应造成碱性不同的生物碱为( ) A．异喹啉＜四氢异喹啉 B．麻黄碱＜去甲麻黄
题型：单项选择题
问题：
共轭效应造成碱性不同的生物碱为( )
A．异喹啉＜四氢异喹啉
B．麻黄碱＜去甲麻黄碱
C．伪麻黄碱＞麻黄碱
D．利血平＜一般叔胺碱
E．咖啡碱＜一般生物碱
题型：单项选择题
第二节短文改错（共10小题；每小题1.5分，满分15分）
此题要求改正所给短文中的错误。对标有题号的每一行做出判断：
如无错误，该行右边横线上画一个勾(√)；
如有错误(每行只有一个错误)，则按下列情况改正：
此行多一个词：把多余的词用斜线(＼)划掉，在该行右边横线上写出该词，并也用斜线划掉。
此行缺一个词：在缺词处加一个漏字符号(∧)，在该行右边横线上写出该加的词。
此行错一个词：在错的词下划一横线，在该行右边横线上写出改正后的词。
注意：原行没有错的不要改。
Dear Johnny,
Thank you for speaking to our class last Thursday.
We’ve all learned a lot about how you make your weather 76.________
forecast. After you left, we made a list what we had 77. ________
learned. Then we set up the small weather station outside 78. ________
your classroom. From tomorrow on, one student in the class 79. ________
will be the weather forecaster every day. He and she will 80. ________
record data in our weather book. During a few months, 81. ________
we will start drawing graphs and charts what show our 82. ________
weather patterns here in Nebraska. Which you can see, 83. ________
your visit has been given us a lot of ideas. Thank you so 84. ________
much for opening our eyes to this interested subject. 85. ________