如图所示为油菜种子在成熟和萌发过程中，糖类和脂肪的变化曲线．

（1）油菜种子内贮存能量的主要物质是____ 

（2）上图中曲线的变化可以说明____ 

（3）油菜种子萌发成幼苗后，生长素含量最多的部位主要是____ 

（4）油菜种子入库前必须进行干燥处理的原因是____ 

目前，我国为保护棉农利益，控制国际棉花进口，国内的棉花价格约比国际市场高1/3；我国纺织行业工人工资一般为美国的1/4，是越南、巴基斯坦等国的3倍。我国一些纺织企业为利用国际市场棉花，在国外建纺纱厂，并将产品（纱线）运回国内加工，在我国同行业企业纷纷到越南、巴基斯坦等国建厂的情况下，总部位于杭州的K企业独自在美国建纺纱厂。2015年4月底，K企业在美国工厂生产的第一批110吨纱线运至杭州。据此完成下列问题。

材料一  中国是世界第一大铁矿石进口国和第一大粗钢生产国，2015年粗钢产量约占全球产量的50%，但高端钢材生产不足。图17为“2015年世界铁矿石主要流向及流量略图”。

材料二  有研究显示，一个国家或地区的人均粗钢需求增幅与人均GDP有一定的相关性。2015年、2017年中国人均GDP分别为7990美元和8836美元。图18为“人均粗钢需求增幅与人均GDP关系示意图”。

材料三  产能利用率是指行业发挥生产能力的程度，是实际产量与设计产能的比率。一般认为，钢铁行业产能利用率处于78%～83%时较为合理，低于75%则为产能严重过剩。图19为“我国2010年～2015年粗钢产能和产能利用率统计图”。

    More than 6000 children were expelled（开除）from US schools last year for bringng guns and bombs to school，the US Department of Education said on May 8．
    The department gave a report on the expulsions（开除）as saying handguns accounted for 58 per cent of the 6093 expulsions in 1996—97，against 7 per cent for rifles or shotguns and 35 per cent for other types of firearms．
    “The report is a clear sign that our nation’s public schools are cracking down（严惩）”on students who bring guns to school，“Education Secretary Richard Riey said in a statement．“We need to be tough-minded（坚强的）about keeping guns out of our schools and do everything to keep our children safe．”
    In March 1997，an 11-year-old boy and a 13-year-old using hand-guns and rifles shot dead four children and a teacher at a school in Jonesboro，Arkansas．In October，two were killed and seven wounded in a shooting at a Mississippi school．Two months later，a 14-year-old boy killed three high school students and wounded five in Daducab，Kentucky．
    “Most of the expulsions，56 per cent，were from high schools，which have students from about age 13，34 per cent were from junior high schools and 9 per cent were from elementary schools．”The report said．

把8克盐放人200克水中，制成的盐水含盐4％。（判断对错）