下列说法中错误的是

【名词&注释】

摩擦阻力(frictional resistance)

[单选题]下列说法中错误的是

A. 踢球时，摩擦阻力使地上滚动的球越来越慢
B. 投球时，手的推力使篮球在空中继续飞行
C. 顶球时，头顶球的力改变了球的运动方向
D. 接球时，手对球的力使球由运动变为静止

查看答案&解析查看所有试题

学习资料：

[单选题]（B）Lifein30yearswillbe36becausemanychangeswilltakeplace,butwhatwillthechangesbe?

A. Thepopulationisgrowingfast.Therewillbe37peopleintheworldandmostofthemwilllivelongerthanbefore.
B. Computerswillbe38smallerandmoreuseful,andtherewillbeatleastoneineveryhome.Andcomputerstudies
C. willbeoneoftheimportant39inschool.
D. Peoplewillworkfewerhoursthantheyaredoingnow,andtheywillhavemorefreetimeforsports,watchingTVand
E. traveling.Travelingwillbemuchcheaperand40.Andmanymorepeoplewillgotoothercountries41holidays.
F. Therewillbechangesinourfood,too.Morelandwillbeusedfor42newtownsandhouses.Thentherewillbeless
G. 43forcowsandsheep,someatwillbemoreexpensive.Maybepeoplewon’teatiteveryday,theywilleatmorevegetablesandfruitinstead.Maybepeoplewillbehealthier.
H. Workinthefuturewillbedifferent,too.Dangerousandhardworkwill44byrobots.Becauseofthis,manypeoplewill
I. nothave45todo.Thiswillbeaproblem.
J. 36_______.
K. same
L. difference
M. different
N. difficulty

本文链接：https://www.51ksbd.net/show/9zrjn3.html