过去人们以为作物播种密度越大,产量越高。在保证营养需要的情况下,有人对小麦的产量

题型:选择题

问题:

过去人们以为作物播种密度越大,产量越高。在保证营养需要的情况下,有人对小麦的产量与播种量的关系进行了研究,结果如下图所示。根据下图分析,当播种密度过大时小麦产量的变化及其生态学原因分别是

[ ]

A.基本稳定,种内斗争加剧

B.明显增多,初始生物量大

C.明显减少,种内斗争加剧

D.明显减少,种间竞争加剧

考点:种间关系种群数量的变化
题型:选择题

原发性肝癌最主要的播散途径是

A.种植转移

B.血液系统

C.淋巴系统

D.直接转移

E.肝内门静脉系统

题型:选择题

Has Tiger Mom gone soft? One year after the release of her book, "Battle Hymn of the Tiger Mother," Amy Chua is back in the spotlight, reflecting on how overnight infamy(恶名)affected her life, her family and her parenting.

"I've changed a lot," she told The Huffington Post. "In October, we had 30 kids at our house! We've hosted parties with lots of food and music."

Last January, the Wall Street Journal published an excerpt(节选)from Chua's book with the headline "Why Chinese Mothers Are Superior." In the excerpt, Chua described how her daughters were never allowed to have sleepovers(在外过夜的儿童聚会), appear in school plays, earn any grade lower than an A . Chua, an author and professor at Yale Law School, spent much of 2011 on the defensive. In fact, many of her interviews seemed to lend fuel to her critics' fire.

Now, with the book out in paperback(简装),she said, "I put passages in the book and used very harsh words that I regret. Everybody has those moments you wish you could take back." Many of the scenes she described in the book are a far cry from the child-raising methods she advocates.

For those who still read "Battle Hymn" as an advice guide, Chua argues that so-called tiger parenting should be employed mainly during a child's early years, ideally between the ages of 5 and 12. These "super-strict parenting methods" are not meant for all ages. Remaining strict after middle school makes you a helicopter parent, according to Chua. And she is quick to point out how different that is from being a tiger mom.

"By the time kids get to high school, helicopter parents are hiring all these tutors, carrying their kids' sports bags. I never checked older daughter Sophia's papers because I knew she knew how to sit down and focus," Chua said.

As for younger daughter Lulu, 15, the rebel for whom the book waswritten, Chua has really backed off. Instead of forcing Lulu to practice violin for hours a day -- the source of their biggest fights, Chua "let her give that up". "My compromise is that I'm going to still be as strict academically, but in exchange she has a lot of social freedom. Lulu has had four sleepovers in the last two months!" Chua said. "Chua predicts she'll only get more easygoing with age.

小题1:From Paragraph 1 we can know that after the publication of the book_____.

A.Tiger Mom became stricter with her children

B.Tiger Mom was thought highly by the public

C.Tiger Mom’s life and family were influenced

D.Tiger Mom became wealthy and easygoing小题2:What does the passage mainly tell us?

A.Tiger Mom has changed and wants to be soft.

B.Tiger Mom persuaded readers to follow her example.

C.How Battle Hymn of the Tiger Mother came out.

D.How Tiger Mom became the worldwide spotlight.小题3:What does the underlined phrase “a far cry from” in Paragraph 4 mean?

A.similar to

B.just the same as

C.very different from

D.a cry far from小题4:What is the writer’s attitude towards Tiger Mom?

A.supportive

B.opposed

C.unconcerned

D.objective

题型:选择题

在Excel中,通过( )键可以实现将活动单元格下移一页。

A.Page Up

B.Page Down

C.Ctrl+Home

D.Ctrl+End

题型:选择题

搭便车问题可能导致提供的公 * * 品数量低于最优量。

题型:选择题

以下各项中,哪些属于综合安全管理制度?()

A.安全生产教育管理制度

B.安全生产检查管理制度

C.伤亡事故管理制度

D.安全奖惩管理制度

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