压力表与存水弯管之间应安装二通旋塞。( )
参考答案：错
填单词，把句子补充完整。
1. Look! This my home.
2. — is your key? —It's on the bed.
3. —Is she strong? — , she isn't.
4. —Are they near the phone? —No, .
5. I a new schoolbag.
往复活塞内燃机的气缸为圆筒形。（）
