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【判断题】
分布在燕山长城内外的夏家店下层文化遗址内出现的小钢刀、铜质随葬品、石制生产工具等说明“夏家店下层文化和上层文化展示的是一幅农牧结合的定居生活图”( )A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下列关于T、B细胞相互作用的描述错误的是
A.
辅助性 T 细胞产生可溶性细胞因子诱导 T 、 B 细胞的增殖
B.
辅助性 T 细胞识别的抗原表位与 B 细胞识别的抗原表位不同
C.
辅助性 T 细胞只有与 B 细胞直接接触才能诱导它增殖
D.
活化的 T 细胞表达 CD40L ，为 B 细胞提供活化的第二信号
E.
活化的 B 细胞表达 B7 ，为 T 细胞提供活化的第二信号
【单选题】To improve the quality of our products ,we asks for suggestions had used the products.
A.
whoever
B.
who
C.
whichever
D.
which
【单选题】The steady rise in the quality of our products ______ the improvement of our equipment.
A.
counts on
B.
suspend in
C.
attaches to
D.
depends on
【单选题】To improve the quality of our products, we asked for suggestions _____ had used the products.
A.
whoever
B.
who
C.
whichever
D.
Which
【简答题】正常成人腋下温度为36-37摄氏度，口腔温度为37-37.5摄氏度。
【单选题】To improve the quality of our products, we asked for suggestions ________ had used the products. [ ]
A.
whoever
B.
who
C.
whichever
D.
which
【简答题】Our products are of very good quality and our firm is always regarded by our customers as the most reliable one.
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