在局部黏膜抗感染免疫中起重要作用的Ig是
A.IgE
B.IgG1
C.IgA
D.IgG4
E.sIgA
参考答案:E
(一) 根据各级对话内容,从下面方框中提供的5个选项中选出能填入空白处的最佳选项
A: Would you sign the register please, SirB: Sure. (), does my room have a private bathA: Certainly. Every room in this hotel has a private bath.
A.Thank you
B.It’s my pleasure
C.By the way
D.No, of course not
E.Never mind
三、类比推理。
A.衣服:衣架
B.房子:窗户
C.货物:集装箱
D.拐杖:轮椅