题型：问答题 简答题 选词并用其适当形式填空。clear; starve; stream; lead; rope; hurt oneself; travel; personal safety; get lost; worry about 1. When we go mountain climbing, we must think about _____.2. Mum,what's for supper? I am _____.3. Tony fell down from the motorbike and _____.4. He spoke very _____ and we could easily understand him.5. The dog can _____ the blind man across the street.6. You must use _____ to go rock climbing.7. He asked if there was a _____ near the village.8. You'd better follow the teacher in the forest, or you may _____.9. It is dangerous to_____ on your own in the jungle.10. I'm an adult now. You don't need to _____ me. 查看答案
题型：问答题 简答题 The traffic was busy on our way to the train station, _____ we caught the train on time at last.A．althoughB．soC．butD．because 查看答案
题型：问答题 简答题 下列关于乙烯和乙烷比较的说法中，不正确的是( )。A．乙烯的结构简式为CH2CH2，乙烷的结构简式为CH3CH3B．乙烯分子中所有原子处于同一平面上，乙烷分子则为立体结构，原子不都在同一平面上C．乙烯分子中含有碳碳双键，乙烷分子中含有碳碳单键，双键不如单键稳定，导致乙烯的性质比乙烷活泼D．乙烯分子中因含有不饱和键，导致乙烯能使酸性KMnO4溶液和溴的四氯化碳溶液褪色 查看答案
题型：问答题 简答题 箱体零件的形位公差主要有（）。A.轴承孔的几何形状精度B.轴承孔之间的相互位置精度C.主要平面的形状精度D.轴承孔与主要平面的相互位置精度E.主要平面之间的相互位置精度F.轴承孔的表面精度 查看答案