题目内容
黄河下游因黄河多次决口形成泛滥平原（黄泛平原），沙岗地和洼地广布，冬春季节风沙活动频繁。红薯是地下块茎的高产作物，喜温怕涝，喜疏松土壤。开封市在沙地采用起垄方式种植红薯，提高了经济效益，但大面积种植加剧了当地的风沙活动。下图为我国局部区域图。据此完成下列问题。
1.黄泛平原的泥沙主要来自
A. 内蒙古高原西部 B. 黄土高原 C. 裸露的黄河河床 D. 太行山区
2.在沙地起垄种植红薯的主要优势是
①使土壤更疏松、通气性更好 ②利于采光，气温高 ③可加厚土层，利于块茎生长④垄沟积水，利于保湿
A. ①② B. ①③ C. ②④ D. ①④
3.开封市大面积种植红薯加剧了当地的风沙活动，主要是因为
A. 春季翻土起垄，导致土层更疏松 B. 过度种植，加剧了干旱
C. 大面积种植，导致森林植被破坏 D. 冬春季节，大风天数多
B. 
C. 
D. 
【题目】用方框中所给短语的适当形式填空
set sail fall ill result in as well as die of |
【1】He used to smoke a lot and lung cancer.
【2】The driver’s drunk driving three deaths and five injured.
【3】He suggested they should early tomorrow morning so that they could get there before dark.
【4】 The little girl was caught in rain and with fever.
【5】 The e-mail the mobile phone is playing a more and more important part in our daily life.