初中 一道数学题，2道英语

来源：百度知道 编辑：UC知道 时间：2024/05/22 19:10:28
同义句
1 The rain will stop later in the day
____stop ____later in the day
2 which is the way to east park?
____ _____ i____to east park

某场设计一种桶式净水器,装有一个入水管和3个出水管.当桶内已有一定量的水后,如果同时打开入水管和一个出水管,可供净水20分,诺同时打开水管和两个出水管,可供净水8分钟,问同事打开入水管和3个出水管,可供净水几分钟

1 The rain will stop later in the day
_It'll___stop _rain___later in the day
2 which is the way to east park?
__How__ __can___ i_get___to east park

设每分钟进的水可供打开一个出水管提供净水x分钟，桶中原有的水可供一个出水管提供净水y分钟

则有20x+y=20
8x+y=2*8
解出x=1/3,y=40/3
则3个出水管全部打开的话，可提供z分钟
z*x+y=3*z
解出z=5分钟

1 The rain will stop later in the day
_It'll___stop _rain___later in the day
2 which is the way to east park?
__How__ __can___ i_get___to east park
则有20x+y=20
8x+y=2*8
解出x=1/3,y=40/3
则3个出水管全部打开的话，可提供z分钟
z*x+y=3*z
解出z=5分钟

1 The rain will stop later in the day
It'll stop rain later in the day
2 which is the way to east park?
How can i get to east park

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这都不会

hjm