病毒核酸特点为单一线性双股DNA病毒()
A.流行性感冒病毒
B.副流感病毒
C.朊粒
D.腺病毒
E.风疹病毒
参考答案:D
当有开口困难及脑神经症状时,最不可能的诊断是()
A.关节区良恶性肿瘤
B.鼻咽癌
C.翼腭窝上颌窦后壁肿瘤
D.癔病性牙关紧闭
E.腮腺恶性肿瘤
---Lingling says Miss Yu has gone to Shanghai, _____ that be true?
---It _____ be true because I saw her in the office just now.
A.may; may not
B.must; can’t
C.can; may not
D.may; can’t