船舶发生共同海损事故后,为保证货方事后分摊共同海损,通常船方应在要求货方提供分摊共同海损的担保().
A.交货后
B.交货前
C.交货中
D.任何时候
参考答案:B
已知函数f(x)=x3-x,
(1)设M(λ0,f(λ0))是函数图象上的一点,求点M处的切线方程;
(2)证明过点N(2,1)可以作曲线f(x)=x3-x的三条切线。
Tom was caught cheating in an important exam. _____, he lost a golden chance of taking part in this competition.
A.Consequently
B.Actually
C.Surprisingly
D.Obviously