防止氧腐蚀的方法是什么?
参考答案:
是保证除氧器的正常运行,也可采用辅助的化学除氧方法,以提高除氧效果。
Can you see the red car over there? It ______ my brother lots of money. [ ]
A. spent
B. took
C. paid
D. cost
现有一份为初中生设计的午餐食谱:米饭、炸薯条、炒菜心。你认为加入下列哪种食物会更好( )
A.炒米粉
B.南瓜饼
C.焖牛肉
D.干煸豆角