体检发现镜下血尿，临床上最可能的原发性肾小球疾病是（）
A.慢性肾炎
B.急性肾小球肾炎
C.慢性肾盂肾炎
D.隐匿性肾炎
E.肾病综合征
参考答案：D
—Is it his notebook?
—_____. [ ]
A. It is his notebook.
B. It isn't his notebook.
C. Yes, it isn't.
D. No, it isn't.
厚壁大口径管若采用临时定位焊定位，定位焊件应采用同种材料；采用其他钢材作定位焊件时，应堆敷过渡层，堆敷材料应与正式焊接相同且堆敷厚度应不小于（）mm。
A、1
B、3
C、5
