硬铝2A11(LY11)气体保护焊时,选用焊丝为HS311。
参考答案:对
—Hi, Jim. It's a long time since we met last.
—_______.[ ]
A. That's all right
B. It doesn't matter
C. I don't think so
D. Nice to see you again
下面哪一个症状体征对诊断颅内压增高最有价值()
A.头痛
B.呕吐
C.视盘水肿
D.偏瘫
E.视力下降