某机械的功率为150W,其物理意义是__________________________。
某机械1s内做的功为150J
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.
新一代计算机最突出的特点是()。
A.采用大规模集成电路
B.具有智能
C.具有超高速
D.能理解自然语言