已知(5-x)2=(-7)2 则x=（）_爱下问搜题

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问题填空题

已知(5-x)²=(-7)² 则x=（）

答案

-2或12

多项选择题

关于羊瘙痒症，下列说法正确的是

A．病羊以消瘦、步态不稳、脱毛、麻痹等为临床特征

B．发生在绵羊，山羊不会得此种病

C．是最先被发现的传染性海绵状脑病

D．其病原体是一类类病毒

E．此病主要使羊瘙痒而常在围栏上摩擦身体，病死率不高

完形填空

I fell in love with Yosemite National Park the first time I saw it, when I was 13. My parents took us there for camping. On the way out, I asked them to wait while I ran up to E1 Capitan, a ___16___ rock of 3,300 feet straight up. I touched that giant rock and knew ___17___ I wanted to climb it. That has been my life’s passion (钟爱) ever since--- ___18___ the rocks and mountains of Yosemite. I’ve long made Yosemite my ___19___.
About 15 years ago I started seeing a lot of ___20___, like toilet paper, beer cans, and empty boxes, around the area. It’s ___21___ me why visitors started respecting the place ___22___ and treated such a beautiful home-like place this way.
I tried ___23___ trash(垃圾)myself, but the job was too big. I would ___24___an hour or two on the job, only to find the area trashed all over again weeks later. Finally, I got so ___25__ it that I decided something had to change.
As a rock-climbing guide, I knew ___26___about organizing any big event. But in 2004, together with some climbers, I set a date for a ___27___. On that day, more than 300 people ___28___. Over three days we collected about 6,000 pounds of trash. It was amazing how much we were able to ___29___. I couldn’t believe the ___30___ we made ---the park looked clean!
Each year volunteers come for the cleanup from everywhere. In 2007 alone, 2,945 people picked up 42,330 pounds of trash and ___31___ 132 miles of roadway.
I often hear people ___32___ about their surroundings. If you are one of them, I would say the only way to change things is by ___33___ rather than complaining. We need to teach by ___34___. You can’t blame others ___35___ you start with yourself.

A．immediately

A．throwing away

C．breaking down

D．digging out

A．satisfied with

B．delighted in

A．dropped out

C．looked around

D．called back

C．questioning

B．explanation