为了去磷，前期熔池温度应控制的适当（）些。
参考答案：低
根据图片把短文补充完整，每空一词。
My friend is Tom He is1.______ years old. He goes to school 2._______．He gets
up3.______ every day. He has4.______ and 5.______ at school. In spring, he
6._______. In summer, he swims. In autumn, he 7._______. In winter, he
8.________．He likes 9._______ and 10._______.He doesn't like11.______.
网络图中由节点代表一项工作的表达方式称作（）。
A.时标网络图
B.双代号网络图
C.单代号网络图
D.搭接网络
1.______ years old. He goes to school 
2._______．He gets 
3.______ every day. He has
4.______ and 
5.______ at school. In spring, he 
6._______. In summer, he swims. In autumn, he 
7._______. In winter, he 
9._______ and 
10._______.He doesn't like
11.______.