问题
单项选择题
与纤溶酶原的激活有关的是( )
A．因子Ⅴ
B．因子Ⅶ
C．因子Ⅷ
D．因子Ⅹ
E．因子Ⅻ
答案
参考答案：E
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与纤溶酶原的激活有关的是( )
A．因子Ⅴ
B．因子Ⅶ
C．因子Ⅷ
D．因子Ⅹ
E．因子Ⅻ
参考答案：E
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| 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 1 rock of 3,300 feet straight up. I touched that giant rock and knew 2 I wanted to climb it. That has been my life's passion (钟爱) ever since--- 3 the rocks and mountains of Yosemite. I've long made Yosemite my 4 . About 15 years ago I started seeing a lot of 5 , like toilet paper, beer cans, and empty boxes, around the area. It's 6 me why visitors started respecting the place 7 and treated such a beautiful home-like place this way. I tried 8 trash(垃圾)myself, but the job was too big. I would 9 an hour or two on the job, only to find the area trashed all over again weeks later. Finally, I got so 10 it that I decided something had to change. As a rock-climbing guide, I knew 11 about organizing any big event. But in 2004, together with some climbers, I set a date for a 12 . On that day, more than 300 people 13 . Over three days we collected about 6,000 pounds of trash. It was amazing how much we were able to 14 . I couldn't believe the 15 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 16 132 miles of roadway. I often hear people 17 about their surroundings. If you are one of them, I would say the only way to change things is by 18 rather than complaining. We need to teach by 19 . You can't blame others 20 you start with yourself.
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