化合物具有亲脂性，能溶于乙醚中，李伯曼反应和Kedde反应均显阳性，但Molisch反应和：Keller-Killani反应为阴性，其紫外光谱在220nm(logε约4.34)处呈现最大吸收，该化合物为( )。 A．甲型强心苷 B．乙型强心苷元 C．甾体皂苷元 D．甲型强心苷元
A.34)处呈现最大吸收，该化合物为(B.甲型强心苷C.乙型强心苷元D.甾体皂苷元
点击查看答案
Text 2 "Hi there. How’s it going" "Oh, fine, fine. How about this weather, huh" "Well, I guess we can always use the rain." What’s that This story Oh, just a little look at small talk. You know, those seemingly meaningless conversations you have dozens of times a day. Maybe you’re waiting for the elevator. Or in a line at the bank. It all seems pretty trivial. Idle chatter about traffic doesn’t do much more than fill the air with empty words that are quickly forgotten. But you should know that small talk actually has a big place in our lives. Pat Oliver, assistant professor on arts, says that, "Left unchecked, small talk can be an invasion. It’s so powerful. It does something to you." "Every morning after spending an hour and a half on the freeway I start the day with small talk with my secretary," Oliver says, "If I don’t make small connection with another person, I can’t work." What causes it As a rule, you’re either trying to force something into your life, or you’re using conversation as an invisible force field to keep them out. You can be wanting to connect with another person, and small talk is your introduction to more meaningful conversation. The way people use small talk is usually determined by where they happen to be at the time. Take the elevator, for instance. Now there’s prime territory. Nobody knows anyone and there’s no reason to start a conversation, but invariably, someone does. Making conversation in such peaceful social settings, according to Oliver, "can confirm your territory. It’s a way of feeling liked and accepted." The topics of small talk don’t matter. In fact, you don’t want anything more taxing than the weather or the traffic. It’s non-threatening talk in a threatening situation. However, the rules change quickly when you’re with lots of people doing lots of talking. Let’s say you’re at a party. Now it’s time to use small talk as a way of making others feel more comfortable around you, so you don’t look silly standing by the food table alone all night.
A．It is used to create a more friendly atmosphere and to avoid embarrassment.B．It is used to show that one is enthusiastic and hospitable.C．It is used by people to encourage those who are confronted with danger.D．It is used by people to protect others in the threatening situation.
点击查看答案
题目内容
（请给出正确答案）
参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
