焊接接头热处理方法的改变不必重新进行焊接工艺评定试验。( )
参考答案：错
下列各项属实证的临床表现()
A.二便不通
B.二便失禁
C.自汗盗汗
D.疼痛隐隐
E.以上均非
—Sorry. Jackson,_______ I you clearly. It's too noisy here.
—I _______ that the party was great.
A．haven't heard; am saying
B．don't hear; said
C．didn't hear; was saying
D．can't hear; will say
