为进一步明确诊断还需做哪些重要检查
A.胸部CT
B.食管镜
C.MRI检查
D.腹部B超检查
E.食管脱落细胞检查
参考答案:B
After we graduated from the college, we keep in touch ______ chatting online often. [ ]
A. with
B. of
C. on
D. by
计算机内存储器分为随机存储器和只读存储器,只读存储器的英文缩写是()。
A.ROM
B.RAM
C.ROM和RAM
D.CPU