When you have dinner, you follow table manners. When you have a l____ , you obey the rules in the classroom. But have you ever thought about needing to m____ your manners in the digital(数码的) world when you use phones, e-mails and social media, like QQ, WeChat, etc?

    As new research by Oxford University noted, "It's just important to treat people with respect online as it is in real life." The study came up with some rules of good manners to live by in the digital age. Their first a____ is not "over-sharing" on social media, which means not posting every detail about your life online, because some of us are not creative e____ to always show off our thoughts and lives on social media.  The manners also i____ not looking through others' phones and not gossiping(说闲话) about others over messages, e____ when you choose "reply all" to send a message to a group of people.

    Although gossip is not h____ chat that can make conversations exciting, it can also be a way to spread something untrue about other people. Gossip can be even stronger on social media than in real life, so it's b____ not to gossip.

    Moreover, when you have bad news for someone, do not leave text messages on social media, chat with him or her by c____ personal messages.

    Nowadays, technology has o____ us different ways to contact others. It is important to remember how to behave toward others online.

    Fei-Fei Li arrived in the U. S. from China at age 16 with many big dreams. And it took many unusual jobs to help her achieve them. Luckily, she was smart and extremely driven. And today, she's the director of Stanford University's artificial intelligence lab.

    As one of the leaders in the world for A. L., I feel much excitement and responsibility to create the most awesome and excellent technology for society and to educate the most awesome and excellent technologists—that's my calling.” Li said.

    She is also a loyal advocate for diversity in the tech industry.

    “I see extremely talented Stanford PhD students struggling with their visas and I find it unthinkable that we create so many barriers for the talents of the world, Li said. While Li was in college at Princeton, she borrowed money from friends and even her high school math teacher to run a dry-cleaning business for her parents in order to help them get by. Li attended classes during the week and worked at the business on the weekends. Then, when Li was in graduate school, her mom developed cancer and had a stroke (中风). It was difficult to keep moving ahead while all of this was happening. The real existential challenge is to live up to your fullest potential, live up to your sense of responsibility and to be honest to yourself about your dreams while doing it, she said.

    Li was named a Great Immigrant of 2016 by the Carnegie Corporation, the nation's oldest grant making foundation which honors roughly 40 naturalized U. S. citizens each year. Her graduate studies were supported by the Paul & Daisy Soros Fellowships for New Americans.

下列有关“探究酒精对水蚤心率的影响”实验的分析，错误的是（    ）

①草履虫②蜈蚣③河蚌④青蛙⑤蜘蛛⑥鲫鱼⑦乌龟⑧蚊子．

在做“测量盐水的密度”的实验中，有下列步骤：①用托盘天平测出盐水和烧杯的总质量；②将部分盐水倒入量筒中，读出量筒中盐水的体积；③用托盘天平测出剩余盐水和烧杯的质量；④计算出盐水的密度值。上述步骤合理的顺序是(  )