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（）指加注有货物及包装状况不良或存在缺陷如水湿、油渍、污损、锈蚀等批注的提单。
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根据明确受让人与否，提单背书可分为（ ）、指示提单和（）
MOOC，a massive open online course,aims at providing large-scale interactive participation and open accessvia the web.In addition to traditional course materials such as videos,readings,and problem sets,MOOCs provide ___1___user forums that help build a community for the students,professors,and teaching assistants.MOOCs first made __2__ in the fall of 2011,when Professor Sebastian Thrun from Stanford Universityopened his graduate-level artificial intelligence course up to any student ___3___，and 160 000 students in more than 190 countries signed up.This new breed of online classes is ___4___ up the higher education world in many ways.Since the courses can be taken by hundreds of thousands of students at the same time,the number of universities might ___5___ dramatically.Professor Thrun has even envisioned a future in which there will only need to be 10 universities in the world.Perhaps the most ___6___thing about MOOCs,many of which are being taught by professors at prestigious universities,is that they're ___7___.This is certainly good news for cash-strapped(经济困难的）students.There is a ___8___of excitement and fear surrounding MOOCs.While some say free online courses are a great way to increase the enrollment of minority students,others have said they will leave many students behind.Some critics have said that MOOCs ___9___ an unrealistic one-size-fits-all model ofhigher educationand that ___10___is no replacement for true dialogues between professors and theirstudents. After all,a brainis not a computer.We are not blank hard drives waiting to be filled with data.People learn from people they love and remember the things that arouse emotion.Some critics worry that online students will miss out on the social aspects of college.
Directions: this section you will hear two min-talks, at the end of each talk there will be some question. Both the talks and the questions will be read to you only once. After each question there will be a pause. During the pause you must choose the best answer from the four choices.[音频]
mini-talk 1
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