纯种甜玉米和纯种非甜玉米间行种植，收获时发现甜玉米果穗上有非甜玉米子粒，而非甜玉米果

阅读下面短文，按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。

Nowadays, people are talking about the expansion of college enrollment. This new policy___16___(adopt) by the government benefits a lot of high school graduates and therefore the country as well. There ___17___ (use) to be such a fierce competition among high school graduates to enter college___18__many of them studied too hard only to spoil their health. Even some of them killed___19___only because they failed in the entrance exams. Now they will have more chances to attend college and the country is also going to benefit   20   it. There will be more well-educated and highly qualified citizens and professionals, ___21___ is essential to the development of the country.

  22  , now some students who otherwise can’t enter a college are not studying hard enough. They think now since colleges enroll more students, they are more  23  (like) to be admitted into one of them even without a high score.

24  (doubt), although there is still room for improvement to this policy, I think it is still a good one which brings more good   25  harm to the students and the nation. It should be still carried out.

S企业不能清偿到期债务时，其债权人对S企业提出破产申请。根据企业破产法律制度的规定，在人民法院受理破产申请后、宣告S企业破产前，可以向人民法院申请重整的有（）。

A.S企业的上级主管部门

B.债务人S企业

C.出资额占S企业注册资本25%的出资人甲

D.出资额占S企业注册资本15%的出资人乙

某高层钢筋混凝土结构为地上16层商住楼，地下2层（未示出），系底层大空间剪力墙结构，如图7-28。2～16层均布置有剪力墙，其中第①、④、⑦轴线剪力墙落地，第②、③、⑤、⑥轴线为框支剪力墙。该建筑位于7度抗震设防区，抗震设防类别为丙类，设计基本地震加速度为0.15g，场地类别Ⅱ类，结构基本自振周期1s。混凝土强度等级，底层及地下室为C50，其他层为C30，框支柱断面为800mm×800mm。地下第一层顶板标高为±0.00m。

假定承载力满足要求，第1层各轴线墙厚度相同，第2层各轴线横向剪力墙厚度皆为200mm。试问，第1层的最小墙厚6（mm），应为下列何项数值时，才能满足《高层建筑混凝土结构技术规程》（JGJ3-2010）的有关要求？（）

A.300

B.350

C.400

D.450

下列解释中，( )是指证券交易的清算。

A．买方支付一定款项以获得所购证券，卖方交付一定证券以获得相应价款

B．一定经济行为引起的货币资金关系应收、应付的计算

C．公司、企业结束经营活动、收回债务、处置分配财产等行为的总和

D．银行同业往来中应收或应付差额的轧抵

新月体主要由哪些细胞增生形成（）

A.系膜细胞

B.脏层上皮细胞

C.毛细血管内皮细胞

D.壁层上皮细胞