以初级卫生保健为主题的国际医学伦理文件是（）
A.《赫尔辛基宣言》
B.《夏威夷宣言》
C.《阿拉木图宣言》
D.《悉尼宣言》
参考答案：C
—Would you like some drinks, boys?
—Yes, , please. [ ]
A. some oranges
B. two boxes of chocolate
C. some cakes
D. two boxes of cola
Bitmap images use a grid of small squares known as（ ）to represent images.
A． pixels
B．points
C．elements
D．dots
