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海带生活史中,有性世代开始于( )。

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  • 【名词&注释】

    禾本科植物(grass)、民主党派(democratic parties)、参政议政、食品安全法(food safety law)、标准答案(standard answer)、重要贡献(important contribution)、寄生植物(parasitic plant)、全国政协、内皮层细胞(endodermal cells)、食品安全保障体系(food security system)

  • [单选题]海带生活史中,有性世代开始于( )。

  • A. 合子
    B. 配子
    C. 孢子母细胞
    D. 游动孢子

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]The ad is mainly intended to .
  • A. encourage the British to travel in China
    B. attract the British to traditional Chinese food
    C. offer service of booking air tickets to tourists
    D. provide the British with a better understanding of China.

  • [单选题]一、(15分,每小题3分)
  • 1.下列词语中加点的字,读音全都正确的一组是

  • A. 饯别(jiàn) 晦涩(huì) 铁栅栏(zhà) 浑身解数(xiè)
    B. 扒手(pá) 吱声(zī) 和稀泥(hé) 步履蹒跚 (pán)
    C. 畜养(xù) 寒噤(jìn) 露马脚 (lòu) 扪心自问(mèn)
    D. 顺遂(suí) 什锦(shí) 蒸馏水 (liú) 兵不血刃(xuè)

  • [单选题]Below is a housing guide for students going to London.Below is a housing guide for students going to London. University accommodation (住所) offices
  • A. Many university accommodation offices have their own list of registered landlords (房东). Others also provide information on accommodation agencies and other housing organization. The advantage of using your university accommodation is that you can get support if you have a problem. The disadvantage is that they are unlikely to have enough registered landlords to houses all their students.
    B. Property papers: Loot and Renting
    C. Loot is an important source (来源) of information about private housing for co-renters. The offers are from private landlords, agencies and individuals looking for other co-renters. They also have a website: http://www.loot.com/. The advantage of using Loot is that there are some excellent bargains. The disadvantage is that there is no quality control over the offers.
    D. Renting is another useful paper. The offers in this paper are mainly from accommodation agencies. Their website is at www. renting.co.uk.
    E. Accommodation agencies
    F. The majority of rented accommodation in London is probably advertised through accommodation agencies. The advantage of using accommodation agencies is that you will have access to a large number of accommodations. A good agent will listen to your requirements and can save you time in looking for the right accommodation. The disadvantage is that they will make a range of charges to potential renters.
    G. Noticeboards
    H. Around the universities you will find a number of noticeboards where offers of accommodation will be posted. These will either be from landlords or from students. Some universities will also have online noticeboards where students can advertise to other students. Advertisements from students can be an excellent way to find accommodation. However, advertisements from landlords can be problematic.
    I. Word of mouth
    J. Some of the best housing in London is never advertised but is passed on from one group of students to another by word of mouth. It might be that you can find out about good offers from final year students. However, don’t suppose that just because you have found out about housing from a friend it is necessarily going to be better than that found through any other source.
    K. Family
    L. Faced with the very high rents charged in London, some students and their parents will consider buying as an alternative. In some cases this might be a good choice.
    M. 45. What is the advantage of using Loot?
    N. It has more offers from accommodation agencies than Renting.
    O. It gives you personal information about other co-renters.
    P. Their website is designed mainly for students.
    Q. There are some good bargains.

  • [单选题]下列真菌中,有性生殖为接合生殖的是( )。
  • A. 根霉
    B. 蘑菇
    C. 禾柄锈菌
    D. 银耳

  • [单选题]在2007年的全国政协大会上,九三学社提交了《关于进一步完善我国食品安全保障体系(food security system)的建议》明确提出我们应尽快出台食品安全法;2009年2月,全国人大常委会通过了食品安全法。这表明①民主党派具有法律规定的参政权
  • A. ②全国政协履行了参政议政的职能
    B. ③全国政协及全国人大常委会共同行使立法权
    C. ④民主党派对食品安全法的制定做出了重要贡献
    D. ①②③
    E. ①②④
    F. ①③④
    G. ②③④

  • [单选题]泡桐属(Paulownia)各种中有不少著名的速生树种。( )
  • A. 正确
    B. 错误

  • [单选题]五倍子是指( )。
  • A. 盐肤木等寄生植物(parasitic plant)
    B. 盐肤木等枝叶上的虫瘿
    C. 寄生虫
    D. 药用成分

  • [单选题]禾本科植物根的内皮层细胞(endodermal cells)在发育后期常五面增厚,只有( )不增厚。
  • A. 横壁
    B. 径向壁
    C. 外切向壁
    D. 内切向壁

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