【简答题】? Look at the chart below. It shows the sales of mobile phones in different companies during April, May and June. ? Which chart does each sentence (11-15) describe? ? For each sentence, mark one lette...
【单选题】题干:在IMO采纳的分道通航水域,帆船与L<米的船舶,不应妨碍下列哪些按通航分道行驶的船舶?< /div>
A.
除从事捕鱼船之外的任何船长大于等于20米的用机器推进的船舶
【单选题】设计凸轮时,若工作行程中αmax>[α],可采取哪种措施。 ( )
【单选题】To understand what true happiness is, one must ______.
A.
have as much fun as possible during one's lifetime
B.
make every effort to liberate oneself from pain
C.
put up with pain under all circumstances
D.
be able to distinguish happiness from fun
【简答题】下图是某生物兴趣小组对一个农田生态系统做调查之后,所绘制的食物网简图。请根据右图回答问题:(9分) (1) 在该生态系统中有 条食物链。 (2) 从生态系统的组成成分看,图中的动物属于农田生态系统的 者。 (3) 收获季节,有不少农民在田里焚烧农作物的秸秆,造成大气污染。针对这一现象,兴趣小组的同学向有关部门建议建造沼气池,利用秸秆生产沼气。那么,分解秸秆产生沼气的生物属于生态系统中的 者。 (4...