对水泥烧失量影响最大的是()
A、细度
B、SO3
C、混合材掺量
D、熟料饱和比
参考答案:C
Having a trip is certainly good for us, but it remains____ whether you will enjoy it. [ ]
A. to see
B. to be seen
C. seeing
D. seen
关于标准头颅侧位片影像显示,不妥的是()
A.前床突
B.后床突
C.额窦
D.蝶窦
E.垂体