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【单选题】
构成宿主抗移植物反应的必须条件包括:A.
移植物中有大量免疫活性细胞
B.
受者体内的免疫活性细胞能够发生免疫应答
C.
宿主免疫功能减弱
D.
供受者间组织相容性抗原相容
E.
受者体内预存大量供者特异性抗体
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反馈参考答案：
举一反三
【简答题】滚动轴承的公差等级由轴承的 ____ 和旋转精度决定,向心轴承公差等级分为 0、6、5、4、2共五个级 , 0级最低 ,2级最高。
【单选题】( )Look at that young woman!That would be his ________ wife.
A.
third
B.
the third
C.
three
D.
the three
【单选题】听力原文：W: Look at that desk. It's the same as ours but half the price. M: Maybe we should try to return the one we bought and get our money back. W: Too late now. But from now on, we'll check out prices...
A.
Check out the prices to get the money back.
B.
Look in this shop before buying anything elsewhere.
C.
Act earlier to return the things they buy.
D.
Buy everything in this shop from now on.
【简答题】A:Look at that woman. She looks like she's going to faint. B:Let's go to her. She ______________ need help.
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