列举森林的作用？

The Cost of Dishonesty

    David began studying in Germany two years ago.The college was a little far from 1 he lived, so he had to take the  2 every day.This clever student soon found it was 3  to escape buying subway tickets,4 he often went and returned without a ticket to 5  money. As a result, he had been caught with no6 in the subway four times but he 7  took them to heart. He thought what he should pay more attention8  was his study. He did work very hard in the last two years and graduated with 9 grades a month ago. Everyone, including David 10  ,thought he would get a good job easily in Germany and have a bright 11 .He went to a big local company12 .But to his surprise, he was not13 given his chance for an interview! He then went to14  famous company, only to receive the same treatment.When he was15  a third time, he couldn't 16 telephoning the company to ask why they didn't  17him. The answer was simple,”We don't offer jobs to 18

people in Germany!”

    Being dishonest may bring us something useful sometimes,but the truth will19  sooner or later and the cost is high. So remember,  20is the best policy (策略).

关于生物大分子，以下哪项叙述是不正确的（）

读北半球等压线和风向示意图，完成下题。