以下展品中由中国地质博物馆收藏并展出的有()。
A.巨型山东龙化石
B.单晶水晶王
C.单晶辰砂王
D.元谋人牙齿化石
E.中华龙鸟化石
参考答案:A, B, C, D, E
—________ on weekends?
—She is going to wash her clothes. [ ]
A. When is she going to wash her clothes
B. What's she going to do
C. Where is she going to do
D. What are you going to do
利用次级点火波形重叠可诊断出()。
A.分电器凸轮磨损情况
B.断电器触电闭合角的大小
C.混合气浓度是否合适
D.喷油器是否堵塞