问题
名词解释
常见杂草
答案
参考答案：
发生频率较高，分布范围较广泛，可对作物构成一定危害，但群体数量不大，一般不会形成优势的杂草。
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常见杂草
参考答案：
发生频率较高，分布范围较广泛，可对作物构成一定危害，但群体数量不大，一般不会形成优势的杂草。
| 完形填空。 | |||
| Tom and Sam are twin brothers. They like playing soccer. They live 1 a big house 2 a beautiful garden. The house is 3 the sea. They often go to the sea and swim 4 it. There are four 5 in 6 family. They are parents, Tom and Sam.. Their father is a worker, 7 their mother is a teacher. 8 is Sunday today. Tom and Sam don't go to school. Their parents are not at work. They go to a park by car. Now they are in the park. The two 9 are swimming in the river and their parents are sitting 10 a tree. Look, they are talking and laughing. A bird is flying in the sky. | |||
( )1. A. in
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