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【判断题】
通常提到连杆机构惯性力平衡是指使连杆机构与机架相联接的各个运动副内动反零，从而减小或消除机架的振动。A.
正确
B.
错误
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反馈参考答案：
举一反三
【判断题】As a general rule, cross-licensing agreements are not invalid so long as they do not distort trade.
A.
正确
B.
错误
【单选题】Cross-licensing agreements are increasingly common in the _____ industry.
A.
Transportation
B.
High-technology
C.
Construction
D.
Consumer durables
【单选题】In the United States , cross-licensing and patent pooling agreements are unlawful if they are:
A.
used to divide up territories among competitors.
B.
used to exclude third parties from competing.
C.
used to restrain trade.
D.
Any of the above.
【简答题】肺实变最早出现的体征是（ ）
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