发现早期肺结核的主要方法是（）
A.红细胞沉降率
B.胸X线检查
C.胸CT检查
D.查痰抗酸杆菌
E.血清特异性抗体的检查
参考答案：B
—Has Jack finished his homework yet? I am waiting for him.
—I've no idea. But he _____ on it the whole afternoon.[ ]
A. is working
B. works
C. was working
D. worked
外围护结构隔热性能检测时，内外表面温度传感器与热桥部位的距离应大于墙体厚度的（）倍以上。
