侧线第一级冷凝温度控制在120℃左右主要是()。
A、脱水
B、脱硫化氢
C、脱氨
D、节能
参考答案:A
看图填空。
1. There are two ______ in the picture.
2. There's only one ______in the zoo.
3. The names of these two ______are Henry and Molly.
4. That ______is big and smart.
5. Where's my ______? I can't find it.
()
A.
B.
C.
D.