新生儿抗感染的最重要Ig是()
A.IgD
B.IgG
C.IgM
D.SIgA
E.IgE
参考答案:B
下列哪项既是症状也是体征
A.下肢浮肿
B.咳嗽
C.恶心
D.头痛
E.皮肤瘙痒
Radar bandwidth is normally()to the range scale and the associated pulse length.
A.fixed
B.matched
C.fitted
D.equal