题目内容

Flacks should develop the connections it has established with leading retailers.

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下面①～⑥各表述了极光产生的一个物理过程。选出其发展顺序排列正确的一项 ()。 ①被激活的地球附近的电子碰到极地大气层的原子上。 ②太阳磁场磁力线与地磁场磁力线接合。 ③一部分磁场带着俘获的粒子和巨大能量反弹回地球。 ④太阳风试图将地磁场带走。 ⑤地球背风面磁力线的变化继而断开。 ⑥一部分地磁场顺流冲去，直趋场外行星。

89________

A) NotB) NoneC) NoD) Nor

A. Not
B. None
C. No
D. Nor

Even if I had known her address, I ________ time to write to her.

A. can not have had
B. will not have had
C. must not have had
D. might not have had