皮皮学，免费搜题
登录
搜题
【单选题】
下面关于在00C以下焊接热力管道的说法正确的是( )A.
可不清除管道上的冰霜
B.
在工作场地可不做防风、防雪措施
C.
预热温度可根据焊接工艺制定；焊接时，应保证焊缝自由伸缩和防止焊口的加速冷却
D.
在焊口未完全冷却前，可在焊缝部位进行敲打
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】选择适当的单词填空。 1. The_____(direct, direction) of wind is always changing in my hometown. 2. It is_____(simply, ) a phone number. 3. It’s midnight and everything is_____(sleep, sleepy) and quiet. 4. ...
【简答题】听下面一段材料,回答第1至3题. 1. Why is the boy unhappy? A. He couldn't find anyone to help him. B. He had a quarrel with his father. C. He lost a computer . 2. What's the boy's problem? A. He is addicted to c...
【简答题】将10进制数2003转换为二进制数是( ),转换为16进制数为( )。
【单选题】We are making you our quotation for shoes _______________________.
A.
as follows
B.
as following
C.
as follow
D.
following
【单选题】We must stop farmers __________ new farmland, but we should __________ more roads. [ ]
A.
making , make
B.
made, build
C.
building, make
D.
making, build
【单选题】He is always sleepy in class because he ________ playing phone games every night.
A.
disliked
B.
dislikes
C.
stayed up
D.
stays up
【简答题】多元糖醇不是口腔微生物 [填空(1)] 适宜作用底物,有些糖醇如木糖醇可抑制其生长繁殖,故长期摄入糖醇不会引起 [填空(2)]
相关题目：
参考解析：
知识点：
题目纠错 0
发布
