1988年的汉城奥运会圣火点燃者孙基祯曾在第11届奥运会上获得冠军时,迫不得已是代表哪个国家参赛的?()
A.英国
B.日本
C.美国
D.韩国
参考答案:B
曲线y=x3-4x在点(1,-3)处的切线斜率为______.
Progress so far has been very good.______,we are sure that the project will be completed on time.
A.However
B.Otherwise
C.Therefore
D.Besides