一、ios开发 怎么删除nsmutablearray的元素

[array removeAllObject] 删除所有

[array removeObjectAtIndex:index]按下标删除元素

[array removeObject:<(id)> inRange:<(NSRange)>]按范围删除

二、请问bop to the top的歌词是什么？

Ryan:

Mucho gusto!

Sharpay:

Ay, que fabulosa!

(trills tongue)Ay!Ay!Ay!

Arriba! Quien es bailar?

Ryan:

Me la me

Sharpay:

I believe in dreamin; shooting for the stars

Ryan:

Baby to be number one you've got to raise the bar

Sharpay:

Kickin' and a scratchin'

Ryan:

Anything it takes to climb the ladder of success

Both:

Work our tails off every day

Gotta bump the competition blow them all away

Ryan:

Caliente!

Sharpay:

Suave!

Yeah we're gonna

Bop, bop, bop, bop to the top

Ryan:

Slip and slide and ride thay rhythm

Jump and hop hop till we drop

Sharpay:

And start again

Zip zap zop zop like a mop

Ryan:

Scoot around the corner

Move it to the groove till the music stops

Both:

Do the bop bop, bop to the top

Don't ever stop bop to the top

Gimme, gimme, shimmy, shimmy

Shake some booty and turn around

Flash a smile in their direction

Sharpay:

Show some muscle

Ryan:

Do the Hustle

Sharpay:

Yeah, we're gonna

Both:

Bop, bop, bop, bop to the top

Ryan:

Wipe away your inhibitions

Both:

Stump, stump, stump do the romp

Sharpay:

And struct your stuff

Both:

Bop, bop, bop straight to the top

Going for the glory

Ryan:

We'll keep stepping up and we just won't stop, stop

Both:

Till we reach the top

Bop to the top

三、scratch计时器怎么做

: 在检测模块里有一个 计时器清零 的积木 想方法执行即可清零 如: 按下旗子 计时器清零

四、schoolwork?还是school work?

一、 schoolwork ['sku:lwə:k;'sku:lˌwə:k] n. 学业，课业 例句: Is her schoolwork up to scratch? 她的功课行吗? 二、 school work ['sku:lwə:k] 功课，作业(包括学校作业和家庭作业) 例句: She shows great diligence in her school work. 她做作业非常用功。