在电子显微镜下,单位膜所呈现出的结构是()
A.一层深色带
B.一层浅色带
C.一层深色带和一层浅色带
D.二层深色带中间夹一层浅色带
E.二层浅色带中间夹一层深色带
参考答案:D
—Is Mr Zhou in the office?
—No, he_______ be there. He has gone to Huanggang. [ ]
A. mustn't
B. needn't
C. won't
D. can't
肝气犯胃型胃痛特点是
A.胃痛暴作B.胃痛,痛连胁肋C.胃脘灼痛D.胃痛隐隐E.胃脘胀满,嗳腐吞食