问题
单项选择题
当用网将留种用的草地罩上后,却发现草的叶子被害虫吃了很多,产生这种现象的原因是 ( )
A.环境污染
B.食物链被破坏
C.缺少光照
D.植被破坏
答案
参考答案:B
当用网将留种用的草地罩上后,却发现草的叶子被害虫吃了很多,产生这种现象的原因是 ( )
A.环境污染
B.食物链被破坏
C.缺少光照
D.植被破坏
参考答案:B
请先阅读下面短文,掌握其大意,然后从各小题所给的A,B,C,D四个选项中选出最恰当的10个,用其适当形式填空白,并将答案写在答题卷的相应位置。每个词限用一次。(每小题1分)
Proving Them Wrong! ![]() I' m John Wood, a doctor at a famous Boston hosp ![]() One evening I saw a documentary about Albert Einstein. According to the documentary, Einstein had done really 小题5:at school. I began to think that Einstein could 小题6: , then I may have a chance, too. I didn't want to leave my job, 小题7: I decided to go to night school to finish high school. Two years later, I went to a 小题8: university. I've often thought I should contact the 小题9: the Einstein documentary and 小题10: him. As for the biology teacher, I might contact her, too, one day - but not to thank her! |