在对汽缸裂纹采用冷焊工艺补焊时,焊接过程中应始终保持基体的温度在150℃左右的范围内
参考答案:错
– Has the professor’s talk got____ to do with your present research?
– Yes, it has____ to do with my research.
A.nothing; a lot of
B.something; nothing
C.anything; a lot
D.anything; little
MSN是()。
A.FTP软件
B.邮件管理软件
C.搜索引擎
D.即时通信软件