而且，合同应规定球员所得的酬劳，并应预先商定其结束日期[3]。
Furthermore, a contractshall provide for the remuneration due to the player and shall be concluded fora predetermined period of time11.
正确，因为双方必须遵守双方签订的合同内商定的事宜。
D, Correct because both parties must comply with what they agreed to in the signed contract.
按双方合同协议商定，允许不小于10米的短段交货。
According to the contract agreement between the two sides agreed to allow not less than 10 meters short delivery.
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