冷天施工混凝土直径大的钢筋应加热到()℃。
A.20℃
B.30℃
C.5℃
D.40℃
参考答案:C
Excuse me, could you tell me ________?
A.where is the nearest park
B.how can 1 get to the park
C.which is the way to the park
D.if is there a park near here
欧共体1995年提出的综合评价概念不包括()
A.以诊断学要求为依据
B.以物理参数为客观评价手段
C.以满足诊断要求所需的摄影技术条件为保证
D.同时,充分考虑减少辐射剂量
E.影像密度的定量标准