【判断题】唐朝中期以后,由于气候变迁,游牧民族开始向比较温暖的农耕地区转移,唐朝的边境,受到了突厥、吐蕃、契丹等游牧社会的不断侵扰。唐朝的边疆,开始陷入了全面的危机之中。
【单选题】With everything needed_____, Mrs. Jackson went to the supermarket after work in a hurry.
【判断题】在外载荷的作用下,船体局部强度设计计算,是把船体分离成板架、框架、连续梁和板来进行计算的 ;
【简答题】Mrs. Jackson has nothing to do at all. She is engaged every day either in talkathon or shopathon