心材由于生长年久,故坚硬,比边材好。( )
参考答案:错
Stand over there____you'll be able to see it better. [ ]
A. or
B. while
C. but
D. and
大疱性类天疱疮免疫病理示________;盐裂皮肤间接免疫荧光检查示基底膜带自身抗体结合________侧。