数据通信中，ITU-T的X.21建议规定了采用同步传送方式的DTE与DCE之间的通用接口，它是以数字传输链路作为基础而制定的。
1、正确正确
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翻译：Sineethepremiumvarieswiththescopeofinsuranee,extrapremiumisforbuyer'saeeount,shouldadditionalrisksbecovered.
Oneofourclientsis______themarket______Men’sShirts.
She________everythingelseandconcentratedonthetaskbeforeher.
WhichofthefollowingtypesofquestionsisNOTincludedintheGrammar-TranslationMethod?
Jameshasjustarrived,butIdidn’tknowhe________untilyesterday.
