胶粘剂拉伸粘结强度试验应在哪种试样状态下进行()
A、干燥状态
B、水中浸泡24h,取出后1h
C、水中浸泡48h,取出后2h
D、水中浸泡24h,取出后2h
参考答案:A, C
The first edition of the magazine was published in 1960, and has been a best-seller _______. [ ]
A. ever since
B. till then
C. ever before
D. after that
肌张力增高是由于()
A.上运动神经元损伤引起
B.下运动神经元损伤引起
C.感觉神经损伤引起
D.交感神经损伤引起
E.肌纤维损伤引起