【单选题】I had no idea she was there. I met her only____. [ ]
【单选题】—I think Mr Zhang may be in his office. —No, he be there. I saw him just now.
【判断题】色谱分析中,色谱柱温度不能高于固定液的最高使用温度。
【单选题】Next time I go there. I______ them about what has happened recently.
【简答题】阅读理解。 Last Sunday, I went to the park with my parents. There were many people there. I saw some boys and girls. They sang. Some English songs. Who was the boy in green? He was David. He played footbal...
【判断题】气相色谱柱的柱温不能高于固定液的最高使用温度,否则固定液挥发流失。
【单选题】— I think Mr. Zhang may be in his office. — No, he _____ be there. I saw him ____ there just now.