题目

实验室制取氧气时，在试管中加热一定量高锰酸钾固体，随着反应的发生，纵坐标表示的是 A.     氧气的质量 B. 固体物质的质量 C. 高锰酸钾的质量 D. 锰元素的质量分数 答案：BB. Choose the best answer and complete the passage(选择最恰当的选项完成短文)How many times has this happened to you? you're trying to pass a crowded sidewalk. And someone talking or texting on a cell phone slows you down, or worse, _________ you.What if we could put these multi taskers(一心二用的人) into their own lane, freeing up half of the sidewalk for pedestrians(行人) who are paying attention?That's the idea behind the new show Mind Over Masses. The show created a separate lane on a Washington, DC sidewalk for those who wanted to look at their phones, while the other lane was for _________ walkers. It was part of a behavior experiment by the National Geographic Channel in the US.However, the experiment didn't really work _________ it could have because a lot of phone users didn't notice the markings at all. "it's no surprise walkers didn't notice the lanes because they were _________ looking at their phones, "said YahooChecking phones on the go is just one of a few annoying things about modern mobile phone usage. Below are some phone etiquettes (礼仪) tips provided by the Guardian. Take a lookYou should reply to messages. It's very frustrating to text a friend who takes a long time to reply, yet _________ to update their statuses(状态)on their social networking sites in the meantime.You should pick a nice ringtone. No one appreciates it when an annoying ringtone breaks into what they’re doingYou should not visit someone's home and immediately ask for Wi-Fi. Do you seriously want to climb over the back of the couch, grab the router(路由器), and read the Wi-Fi password off the back of it? _________ go to your friend's home, drink and eat what your host gives you, and chat face to face.1.A. runs away B. runs out of C. runs into D. runs after2.A. slower B. quicker C. more careful D. more patient3.A. as well as B. as soon as C. as good as D. as long as4.A. too afraid B. too busy C. too careful D. too difficult5.A. fails B. succeeds C. manages D. enables6.A. Instead B. Instead of C. In addition D. In return 1.C 2.B 3.A 4.B 5.A 6.A 【解析】本文介绍了现在很多人忙于在手机上发送文本或者等着回复信息，文中告诉人们一些使用手机的礼仪。 1.C 考查动词短语及语境的理解。A. runs away 逃跑；B. runs out of 用完；C. runs into 遇见； D. runs after追逐；句意：正在电话上聊天或者发短信让你慢...