下列疾病中,超声检查是首选且可靠性最高的是()
A.肝血管瘤
B.肝腺瘤
C.肝囊肿
D.肝内转移灶
E.炎性假瘤
参考答案:C
U形管换热器在壳程内可按工艺要求安装()。
A、折流板
B、纵向隔板
C、加热管
D、管箱
-Are these your books?
-__________.[ ]
A. Yes, these are.
B. Yes, they are mine.
C. Yes, there are.
D. Yes, they are my.