【单选题】When I began to sing,he laughed and made me ________. [ ]
【多选题】生物活性最强的维生素D3是
A.
皮肤中7-脱氢胆固醇经紫外线照射转化而来的维生素D3
【单选题】On a hunch I went over the garage and took a quiet look-see at your car.
【简答题】When
I began to sing, their laughter _____ me very much.
【多选题】下列关于空心阴极灯使用注意事项描述正确的是( )。
【简答题】根据所给中文或首字母写出相应单词的正确形式。 1. When I began to sing, he laughed and made me e____________. 2. He said that he p_________ to stay at home rather than go with us. 3. He has been practicing these days, in p__...
【单选题】We went to the West Lake yesterday, _______, not surprisingly, was crowded with visitors from all over the world. [ ]
【单选题】下列关于空心阴极灯使用注意事项描述不正确的是[填空(1)]。