枪手沿水平方向对准正前方100m处的靶射击,第一发子弹击中靶上的A点,初速度为500m/s,第二发子弹击中A点正下方5c

正因为他是主角,所以你认为如果题目是四个火枪手的话,那么这本书到底应该主写谁呢,我们一定会以为达达尼昂和另外三个火枪手一样,只是本书的四个主角之一,但不是这样,正因为是三个火枪手这个名字,才让我们感到作者是想以主角为第一视角,三个火枪手为第二视角,把他和他们三人分开来.

可以的,完全没关系
一个是带药,一个是加热功能,就像任何牌子的大米都能放进任何牌子的电饭煲煮饭一个概念~

B

A．H呼天枪地”的“枪”应为“抢”；“整装待发应”的“抢”：“整装待发”的“发”读fā，“间不容发”的“发”读fà；B．“着”都读zháo：“校”都读jiào；“当"都读dà n g;C．“拗口”的“拗”应读空ào，“执拗”的“拗”应读n i ù，“力能扛鼎的” “扛”应读gāng，“肩扛手提”的“扛”读káng；．D．气慨的“慨”应为“概”

1.生活中我们常用一些成语来描述物体的运动,下列成语中描述距离的是
A.风驰电掣 B.疾如雷电 C.一箭之遥 D.蜗行牛步
2.在力学范围内,国际单位制规定的三个基本量是
A.长度、力、时间
B.速度、力、质量 KS5U
C.加速度、速度、长度
D.长度、质量、时间
3.下列v-t图像中,表示初速度为零的匀加速直线运动的是
4．在科学的发展历程中,许多科学家做出了杰出的贡献.下列叙述符合历史事实的是
A．伽利略否定了亚里士多德“重物比轻物下落快”的论断
B．牛顿总结出了行星运动的三大规律
C．爱因斯坦发现了万有引力定律
D．卡文迪许建立了狭义相对论
5．马拉着车奔跑,马对车的拉力F和车对马的拉力F′是一对作用
力和反作用力,则两力的大小关系是
A．F>F′ A．F

Advantages and Disadvantages of Online Learning:
Online learning may be fun and easy to understand.Many things can be done on the net and now,learning too.The advantage is that online learning can save time,can make lesson fun and since it is done online,more people may be interested.
However,there are also disadvantages.The disadvantages are that,since it is online learning,it must be done on the computer,some people,may use online learning as an excuse to play computer games.Online learning might also affect our eyesight,too much radiation is also not good.
All in all,i think that though online learning is a good thing,many people might take chance of it and turn it into something bad.
Is Failure a Bad Thing?
Failure,is it a good or bad thing?In the Chinese proverb,failure is success's mother.It means that,before you succeed in doing something,you might have failed doing it many times before u can finally succeed in it.It is true,in our life,it is full of successes and failures.But everytime we succeed,we go through failures and it make us stronger.Many people just stop doing what they want when they fail.They don't persevere and that's the reason why they can't succeed..In my opinion,like what i had mentioned earlier,succeeding in something isn't something that easy that everyone can achieve,only when you can get up on your feet after you fall,then you can be a step nearer to your goal and succeed.

A死亡几率：（0.7+（1-0.7）*0.5+0.5+（1-0.5）*0.5）*0.5=0.8
B死亡几率：（0.9+（1-0.9）*0.5+0.5+（1-0.5）*0.5）*0.5=0.85
C死亡几率：（0.9+（1-0.9）*0.7+0.7+（1-0.7）*0.9）*0.5=0.97
所以是C最可能死亡.

大仲马,(Alexandre Dumas l802～1870)
《三个火枪手》(The Three Musketeers)

After reading it,the first feeling happened to my heart is that it just likes a fairy.Though it may constructed basing on current century,it appears a certain happiness which seldom seemed in that world like.Alexandre Dumas Pere's works show us his wonderful narratives and his hopes (maybe) to his world.So heros with great power always be seen in his works.So maybe I can't believe he is a very very good writer whoes works didn't give much importance of reality though I like him and his works very much.
This novel's four actors must leave a deep impression on us I think.Athos'reason,Melady's viciousion...all these consists of a beautiful world(with justice and evil)____can love ,can hate ,can angery,can happy...with loyalty and nature.So clearly a world!

这是一个斜抛问题,简单,看好了
s可以知道是48吧,带进去,就是(u^2)/9.8=46吧,然后就是u^2=9.8x46吧,接下来算u,就是开根号,取近似值,
记得给我分哦