男性,72岁,慢性胃炎30年,近2周出现发作性胸痛,伴反酸、烧心、呃逆
此时首先要进行以下哪种检查
A.胃镜
B.心电图
C.冠状动脉造影
D.24小时食管pH监测
参考答案:B
We have two new students. ______ names are Tom and Mike.[ ]
A. They
B. Them
C. Their
D. Theirs
热粘合有哪些?