松树的作用是什么

字有几画第三画是几呢? 一道英语单选题（选什么,为什么）—Could you turn the TV a little bit?—___________.Is it disturbing you?A.Take it easy B.I'm sorryC.Go aheadD.Yes,I could the difference between " mental problem "and "psychological problem"?两者都译为“心理问题”,可是在英文里有什么区别吗?求大侠相助,谢谢啦~~~ 一道英语单选题.为什么选B,看看Several ____are still watching the traffic on National DayA.hunderds polices B.hundred police C.hundred polices D.hundreds police为什么要选B呢? A Psychological Exploration of A Man with A Serious Mental Problem?翻译, 英语单选题,选什么,为什么1.9 I didn’t ___ what people were saying.A.have B.get C.receive D.knew 翻译emotional or mental problems can arise from a physical cause. 选择题.( )is the book? lt's near the door. 爽的第三笔是什么?用部首查字法先查部首( ),再查( )几画 袭的部首是什么? 熬除部首外几画?第三笔是什么 four boys behind one boy and are boy in the middle .how many boys? there are fifty-one boys and girls in the class是说总共51个还是加起来51戈、、如果有要讲的讲解一下呗,我发现。我上面的问题问了同样的。是加起来51个还是各51个。 这里应该选什么?(一道小学六年级英语单选题)The twins have learned a lot _____ they came to China.A.when B.as soon as C.since D.after究竟是C还是D呢？真是郁闷 chief的复数形式是什么 形容生气的成语 不要太夸张的. 正交矩阵中A'是什么矩阵啊?A的转置还是别的? 矩阵A的逆=A的转置,即正交矩阵,求证,|E+A^T|=|A+E|,其中A^T表示A的转置.写出具体步骤, My mother gives me a present.(改成同义句）He doesn't know what he will wear.(改成简单句）The girl might know someone at the party.(改成否定句）I'm too tired to sleep well.(改成复合句）Peter was too tired.He could not keep his 关于正交矩阵!矩阵A和他的转置矩阵相乘等于2E 算正交矩阵吗 My mother ofter makes me nice cakes?(同义句转换) 我们看了一部关于海豚的电影.用英语怎么说? 中译英 中国在世界上正起着积极的作用 pps stream中的stream是什么意思? 英语填空：The stream _____to the river.It is____one in the countryside.A.runs,the longest B.runs,a longer C.is run,the longest D.run,a longest stream是什么意思 Her birthday is December 15 th 对 December 15 th 提问 Her birthday is December 7th.(同义句) Is her birthday in December?肯定回答》 在历史上对中国的文化曾产生深刻影响的： 骨穿检查外铁加内铁百分之65, 腰穿是什么意思,和骨穿一样吗?