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【单选题】
I型变态反应又称速发型变态反应,如过敏性鼻炎,主要是由A.
IgE介导
B.
IgM介导
C.
IgA介导
D.
IgG介导
E.
Sl抗体介导
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反馈参考答案：
举一反三
【简答题】It is d______ to skate on such thin ice.
【简答题】英国的网络域名定为 A ..com B..gov C..uk D..edu
【单选题】He looks thin, but he is _____ than before. [ ]
A.
thinner
B.
more thin
C.
more strong
D.
stronger
【单选题】How often are the Nobel prizes awarded?
A.
Five times a year.
B.
Once a year.
C.
Twice a year.
D.
Once every two years.
【简答题】A．Less than a year. B．Only a week. C．More than a year. D．Two weeks and a year.
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