【单选题】已知BCl 3 是平面三角形分子,则中心原子B所采取的杂化类型为( )
【单选题】Part B Directions: You will hear four dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each ques...
A.
To improve his skating techniques.
【简答题】非谓语动词 5-6 一、单选题(共 50 题;共 100 分) 1.Nowadays, Young people send messages to their parents instead of ______ them. A. Write to B. writing C. writing to D. writes 2.We should urge people _______ riding in...
【简答题】Listen to the conversation and fill in the blanks. A: Hey, what's wrong? You look really stressed! B: I have an important ___1___ tomorrow. I've been studying for it all week, but I feel like I don'...