中国四大发明中哪一项发明在中世纪前期直接促进了西欧文化的思维提升：（）
A、造纸术
B、火药
C、指南针
D、印刷术
参考答案：D
单词拼写。
1. He always looked____ (乐观的)even in defeat.
2. The problems facing the President are____ (巨大的)．
3. I have a pain in my throat and it hurts to s____.
4. I think pay is their mam m____for working.
5. Teachers provide a model for children to i____.
化学性皮肤灼伤有轻度灼伤和重度灼伤两种形式
