在冬季,水环式真空泵停运后需要对泵体进行()操作。
A.保温
B.充液
C.排液
D.保压
参考答案:C
给图片找出相应的句子。
A. It's time to go to school.
B. It's time for math class.
C. It's six o'clock.
D. Lunch is ready.
E. I have an English class on Monday.
F. I like music class.
下列关于肝腺瘤,说法不正确的是().
A.肿瘤通常有包膜
B.镜下细胞排列杂乱无章,无正常肝小叶结构
C.肿瘤内可见脂肪
D.肿瘤内含胆管
E.肿瘤实质内不易出血