Which of the following is true of the holiday camp?_____
A: It is free of charge.
B: It lasts 12 days.
C: It is organized by Broughton.
D: It attaches little importance to ecology.
钛及钛合金人工牙根的表面处理方法一般可分为________、_______、_______和________四大类。
Which of the following is NOT mentioned as one of the ways children can deal with money?_____
A: Donating their money to the poor.
B: Buying a desirable new cell phone.
C: Setting costly goals for themselves.
D: Saving it in a personal bank account.