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甲公司与乙公司签订的绿豆买卖合同效力如何？为什么？

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ABC公司有三个业务类似的投资中心，使用相同的预算进行控制，其1997年的有关资料如下：
在年终进行业绩评价时，董事会对三个部门的评价发生分歧：有人认为C部门全面完成预算，业绩最佳；有人认为B部门销售收入和营业利润均超过预算，并且利润最大，应是最好的；还有人认为A部门利润超过预算并节省了资金，是最好的。
假设该公司资本成本是16%，请你对三个部门的业绩进行分析评价并排出优先次序。

Part B
Look at the picture below and write an essay of about 120 words making reference to the following two points:
1) a description of the picture;
2) your suggestions on how to protect consumers' rights.

发展旅游业为什么要规划先行？

Part B (10 points)
Clattering keyboards may seem the white noise of the modern age, but they betray more information than unwary typists realize. Simply by analyzing audio recordings of keyboard clatter, computer scientists can now reconstruct an accurate transcript. of what was typed--including passwords. (41) .
Such snooping is possible because each key produces a characteristic dick, shaped by its position on the keyboard, the vigor and hand position of the typist, and the type of keyboard used. But past attempts to decipher keyboard sounds were only modestly successful, requiring a training session in which the computer matched a known transcript. to an audio recording of each key being struck. (42) . Furthermore, each new typist or keyboard required a fresh transcript. and training session, limiting the method's appeal to would-be hackers.
Now, in a blow to acoustic security, Doug Tygar and his colleagues at the University of California, Berkeley, have published details of an approach that reaches 96% accuracy, even without a labeled training transcript. (43) . The software tentatively assigns each click a letter based on its frequency, then tests the message created by this assignment using statistical models of the English language. For example, certain letters or words are more likely to occur together-if an unknown keystroke follows a "t", it is much more likely to be an "h" than an "x". Similarly, the words "for example" make likelier bedfellows than "fur example". In a final refinement, the researchers employed a method many students would do well to deploy on term papers., automated spellchecking.
By repeatedly revising unlikely or incorrect letter assignments, Dr. Tygar's software extracts sense from sonic chaos. That said, the method does have one limitation: in order to apply the language model, at least five minutes of the recorded typing had to be in standard English (though in principle any systematic language or alphabet would work). But once those requirements are met, the program can decode anything from epic prose to randomized, ten-character passwords.
(44) . He says it is quite simple to find the instructions needed to build a parabolic or laser microphone on the web. You could just point one from outside through an office window to make a recording. And as he points out, would-be eavesdroppers might not even need their own recording equipment, as laptop computers increasingly come equipped with built-in microphones that could be hijacked.
(45) . His computers were less successful at parsing recordings made in noisy rooms. Ultimately, though, more sophisticated recording arrays could overcome even background noise, rendering any typed text vulnerable. Dr. Tygar therefore recommends that typed passwords be phased out, to be replaced with biometric checks or multiple types of authorization that combine a password with some form. of silent verification (clicking on a pre-chosen picture in a selection of images, for example). Loose lips may still sink ships, but for the moment it seems that an indiscreet keystroke can do just as much damage.
[A] This sort of acoustic analysis might sound like the exclusive province of spies and spooks, but according to Dr. Tygar, such attacks are not as esoteric as you might expect.
[B] The sounds of typing can be decoded, which can be used to decode password, so if you are typing random, secure passwords.
[C] The new approach employs methods developed for speech-recognition software to group together all the similar-sounding keystrokes in a recording, generating an alphabet of clicks.
[D] To protect against these sonic incursions, Dr. Tygar suggests a simple remedy: turn up the radio.
[E] The major advance here is that it no longer requires hours of training the model in