气孔率指在射线底片有效长度范围内，（）占焊接接头投影面积的百分比
参考答案：气孔投影面积
用括号内单词的适当形式填空完成短文。
Dear Amy,
Today I 1.____ (eat) a hamburger for lunch. I 2. (like) harnburgers. But my Mum doesn't 3.____
(like) hamburgers at all. She 4. (drink) juice. Tomorrow is my birthday. My Mum is going to 5.
(make) a cake for me. I'm going to 6. (eat) lots of delicious food! I hope you 7.____ (be) with me.
With love,
Daming
适合制作咖啡的水温为（）
A、80~85℃
B、88~95℃
C、95~98℃
D、100~110℃
