问题
单项选择题
HTK型光子探头的主要光子器件采用HgCdTe（锑镉汞）核心元件，采用密闭充氮三级半导体制冷，工作环境低于环温（）。
A.60℃
B.70℃
C.80℃
D.90℃
答案
参考答案：B
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HTK型光子探头的主要光子器件采用HgCdTe（锑镉汞）核心元件，采用密闭充氮三级半导体制冷，工作环境低于环温（）。
A.60℃
B.70℃
C.80℃
D.90℃
参考答案：B
A boy lost his arms in an accident and his father lost his life. Since then, he had to _ the arms of his younger brother. Except for writing with his toes(脚趾头), he could hardly do _ in his life. As the two brothers grew up together, they had lots of and they often argued . Then one day, his younger brother him. So he was very sad and didn't know to do. A girl lost her hands because of a fire. Though her elder sister wanted to her, she decided to be completely independent . At school, she always studied hard. Once she wrote the following in her composition, "I am . Though I lost my hands, I still have legs. Though my wings are broken, my heart can still fly." One day, the boy and the girl were both invited a television interview program. They both were asked to write something on a piece of paper with their toes. The boy wrote "My younger brother's arms are my arms" the girl wrote "Broken wings, heart".
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