The overweight adolescent client tells the nurse that he would like to lose weight and asks the nurse’s opinion on how to accomplish his goal. Which of the following suggestions would be most appropriate

A. Exercising more often.
B. Severely limiting calorie intake.
C. Participating in an adolescent weight-reduction program.
D. Cutting clown on sweets and other snacks.

某物体运动的位移时间图像如图所示，则物体

A．做往复运动

B．做匀速直线运动

C．朝某一方向做直线运动

D．不能确定物体的运动情况