右面的漫画所揭示的网上贩卖公民个人信用卡的行为侵犯了公民的()
一个全透明的正方体上面放有一根黑色的金属丝(如图),那么金属丝在左视图中的形状是( )
已知:①BrR1 →THFMg BrMgR1 →BrR2 R1﹣R2(THF为一种有机溶剂)
②C6H5﹣O﹣R ①Li,THF,室温②H3O+ C6H5﹣OH
请回答下列问题:
读一读,把正确答案代码填入相应的括号里。
① What can you do?____ A. I need a new dress.
② What can she do?____ B. I can ride a bicycle.
③ What can he do?____ C. She can fly a kite.
④ What do you need?____ D. He can play football.