问题
单项选择题
肾小管分泌过程是
A．被动转运
B．主动转运
C．促进扩散
D．胞饮作用
E．吞噬作用
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
肾小管分泌过程是
A．被动转运
B．主动转运
C．促进扩散
D．胞饮作用
E．吞噬作用
参考答案：B
阅读下面短文，从文后各题所给的四个选项中选出一个最佳答案。 On a snowy evening, a rich lady was standing by the road. She was very worried. Her had broken down. Just then a poor man named Robert came. He was on his back home from work as usual. The lady wondered, “Is the man going to me? He looks very cold and hungry." But to her surprise, stopped and said with a smile, “Can I help you, madam?" After forty , the car was at last fixed by Robert. The lady wanted to pay him. “No, that's , madam." he said, “I was just helping someone in . If you really want to pay me back, I hope you see someone in need, you should give him a hand." A few minutes later, the lady a shabby (破旧的)house by the road. She remembered Robert's words, so she stopped. The hostess(女主人) warmly asked her . The lady could see that was a family and that they needed help. When the hostess was making tea in the kitchen, the lady on a table 500 dollars and went away quietly. Robert came home later than before, thinking how their life was. His wife was pregnant(怀孕) and the baby was to be born the next month but there was not money. His wife went up to him, gave him a kiss and said softly, “Don't worry, dear! Everything's going to be all . A stranger has helped us out." Let's always be ready to help others because helping others is helping ourselves.
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