按劳取酬原则
参考答案：
要求以劳动为尺度按照劳动的数量和质量进行报酬分配。
听句子，缩写原文。（）
A．My friends try to persuade me to invest in the stock market.
B．My friends talk a lot about investing in the stock market.
C．My friends say that investing in the stock market is crazy.
D．My friends and I have different opinions about the stock market.
吐温类表面活性剂溶血作用的顺序是( )
A．吐温20＞吐温40＞吐温60＞吐温80B．吐温80＞吐温60＞吐温40＞吐温20C．吐温80＞吐温40＞吐温60＞吐温20D．吐温20＞吐温60＞吐温40＞吐温80E．吐温40＞吐温20＞吐温60＞吐温80
