第21章附加题
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ands，__________their reputations over centuries，are facing new challenges from the modern market.
ahaving developed
eing developed
cdeveloped
ddeveloping
这个题目是考察非谓语动词。非谓语动词逻辑主语是many chinese
ands，很多中国品牌已经扬名数百年，由over centuries可知应该用完成式，所以选a。
__________not for the support of the teachers，the student could not overcome her difficulty.
ait were
bwere it
cit was
dwas it
考查虚拟语气。句意为：要不是老师们的支持，这个学生是无法克服她遇到的困难的。虚拟语气中be动词常用were，故选b。
located_________the belt meets the road， jiangsu will contribute more to the belt and road construction.
awhy
bwhen
cwhich
dwhere
考察连词。句意为：位于丝绸之路上的江苏，将为一带一路建设作出更大的贡献。located，“位于”，后跟地点状语从句，故而选d。
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请认真阅读下面有关我国电影票房收入（box-office income）的柱状图及相关文字，并按照要求用英语写一篇150词左右的文章。
题目主要是考察对于文章的理解，李宁刷刷刷，潇潇洒洒的写下200多个单词。
吃完晚饭回到教室里，开始两门选修的考试，在苏省，高考是三加二的形式，高考分数够了看选修，选修按照全省的比例划分a＋，a，b＋，b，c，d，比如你想考京城大学，它的分数线要428，你的分数达到了，但它所需要的两门选修是两个a＋，如果你没有达到它的要求，那怕一个是a＋一个是a，那对不起，你不能报。
李宁的选修是物理和生物，第一场自然是物理：
如图所示，两个单匝线圈a、b的半径分别为r和2r.圆形匀强磁场b的边缘恰好与a线圈重合，则穿过a、b两线圈的磁通量之比为()
a1:1
b1:2
c1:4
d4:1
由于线圈平面与磁场方向垂直，故穿过该面的磁通量为：Φ=bs，半径为r的虚线范围内有匀强磁场，所以磁场的区域面积为：***，结合图可知，穿过两个线圈的磁感线的条数是相等的，所以磁通量都是：***，与线圈的大小无关，故选项a正确，选项bcd错误；故本题选： a。
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多项选择题，每小题4分，共计16分．每小题有多个选项符合题意．全部选对的得4分，选对但不全的得2分。错选或不答的得0分．
“天舟一号”货运飞船于2017年4月20日在文昌航天发射中心成功发射升空，与“天宫二号”空间实验室对接前，“天舟一号”在距离地面约380 km的圆轨道上飞行，则其（）
a角速度小于地球自转角速度
b线速度小于第一宇宙速度
c周期小于地球自转周期
d向心加速度小于地面的重力加速度
根据卫星的速度公式和v=***得：***，将“天舟一号”与地球同步卫星比较，由于“天舟一号”的轨道半径小于地球同步卫星的轨道半径，所以“天舟一号”的角速度大于地球同步卫星的角速度，而地球同步卫星的角速度等于地球自转角速度，所以其角速度大于地球自转角速度，选项a错误；第一宇宙速度是卫星绕地球做匀速圆周运动最大的运行速度，知其线速度小于第一宇宙速度选项b正确；由知“天舟一号”的周期小于地球同步卫星的周期，而地球同步卫星的周期等于地球自转周期，所以其周期小于地球自转周期，选项c正确；由知，其向心加速度小于近地卫星的向心加速度，而近地卫星的向心加速度约等于地面的重力加速度，所以其向心加速度小于地面的重力加速度，选项d正确；故本题选：bcd
最后一门，生物：
下列关于糖类化合物的叙述，正确的是（）
a葡萄糖、果糖、半乳糖都是还原糖，但元素组成不同
b淀粉、糖原、纤维素都是由葡萄糖聚合而成的多糖
c蔗糖、麦芽糖、乳糖都可与斐林试剂反应生成砖红色沉淀
d蔗糖是淀粉的水解产物之一，麦芽糖是纤维素的水解产物之一
葡萄糖、果糖、半乳糖元素组成相同，c、h、o，a错误；淀粉、糖原、纤维素都是由葡萄糖聚合而成的多糖，b正确；蔗糖不是还原性糖，不能与斐林试剂反应生成砖红色沉淀，c错误；淀粉的水解产物是麦芽糖和葡萄糖，纤维素的水解产物是纤维二糖和葡萄糖，d错误。故选b。
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