题目内容
Nowadays, network has allowed people to share resources and overcome the barriers of spacedistance.
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A 1is a legal, binding and enforceable 2made between two or more parties. We can also 3a contract as an exchange of promises which the law will 4. To be legally binding as a contract, a 5must be exchanged for adequate 6. On the other hand, to make the contract 7, it is 8that the parties to sign a contract have legal power and freedom of 9contract. They must intend it to be binding. They must agree on the 10of the contract and the purpose must be 11. There must be valuable terms and the terms of the agreement must be clearenough to be understood.
Please find the most best match for the following English expression.
（ ）和镍组成的合金，被成为“记忆合金”
（）是用来制造滑动轴承的特定材料
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