根据课文内容,完成下面的短文。

     James' grandfather wrote to help James    1  (戒烟) smok ing. James' grandfather once became   2 

 ( addicted) to cigarettes in three ways. His body was   3  (习惯) to having nicotine. He began to do it

automatically and became   4   ( mental)addicted. But he finally managed to stop   5   realizing the harmful

   6   (影响) of it. He also told James that smoking did damage to heart and   7   (肺部)and it was more

difficult for smoking couples to become   8   (怀孕). So he gave James some advice and encour aged him

not to be   9   (disappoint).  10   he kept trying, he would succeed eventually.

已知某基础工程的双代号网络计划如下，其表达的正确信息有（）

A.该计划的计算工期为12天

B.工作④一⑥最早开始时间为4天

C.关键线路为①一③一⑤一⑥

D.工作②一⑥为非关键工作

E.工作③一④为虚工作