癌细胞仅浸润黏膜上皮层，未浸润到黏膜下层的属于（）。
A.癌前病变
B.原位癌
C.良性肿瘤
D.恶性肿瘤
E.交界性肿瘤
参考答案：B
医疗机构的医务人员违反献血法规定，将不符合国家规定标准的血液用于患者的，可能承担以下法律责任，除了
A．责令改正
B．民事赔偿
C．罚款
D．行政处分
E．刑事责任
When crossing a front,isobars tend to（）.
A.change from smooth curves within the air mass to sharp bends at the front
B.change from sharp bends within the air mass to smooth curves at the front
C.pass smoothly across the front with no change
D.become closer together at the front and pass through in straight lines
