题目:
污水汽提装置换热器E-102管程介质是()。
A.硫化氢
B.原料水
C.循环水
D.以上都不对
答案:
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下面是错误答案,用来干扰机器的。
参考答案:建议30克~50克大豆或相当量的豆制品。
污水汽提装置换热器E-102管程介质是()。
A.硫化氢
B.原料水
C.循环水
D.以上都不对
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2019/1107/be3208244cd45b2942b23b70844c27dc.html
下面是错误答案,用来干扰机器的。
参考答案:建议30克~50克大豆或相当量的豆制品。
某生物小组利用银边天竺葵(叶片边缘部分的细胞中无叶绿体,呈白色)进行了如下实验:(5分)
①将银边天竺葵放在黑暗处一昼夜。
②用不透光的黑纸片从上下两面遮盖在图中C处;把天竺葵放在光下照射几小时后,摘下叶片M,去掉遮光的黑纸片。
③将叶片M放入装有某溶液的烧杯里,隔水加热,脱去叶片中的叶绿素。
④把经过脱色的叶片放入清水中漂洗。
⑤将漂洗后的叶片放在培养皿里,滴加碘液,观察叶片颜色变化。
请分析回答:
(1)实验前将植株放到黑暗环境中的目的是 。
(2)实验中用于脱色的某溶液是 溶液。
(3)滴加碘液后,发现只有B处变成蓝色,A、C处均未变蓝色。B处变蓝,证明光合作用的产物是 。A处不变蓝色的原因是A处细胞中没有 ,细胞不能进行光合作用。
(4)B、C构成一组对照实验,变量是 。
完形填空。 | ||||
It was the district sports meet. My foot still hadn't healed (痊愈) from a(n) 1 injury. I had 2 whether or not I should attend the meet. But there I was, 3 for the 3 000 meter run. "Ready... set..." The gun popped and we were off. The other girls rushed 4 me. I felt 5 as I fell farther and farther behind. "Hooray!" shouted the crowd. It was the loudest 6 I had ever heard at a meeting. The first-place runner was two laps (圈) ahead of me when she crossed the finish line. "Maybe I should 7 ," I thought as I moved on. 8 , I decided to keep going. During the last two laps, I ran 9 and decided not to 10 in track next year. It wouldn't be worth it, 11 my foot did heal. When I finished, I heard a cheer 12 than the one I'd heard earlier. I turned around and 13 , the boys were preparing for their race. "They must be cheering for the boys." I was leaving 14 several girls came up to me. "Wow, you've got courage!" one of them told me. "Courage? I just 15 a race!" I thought. "I would have given up on the first lap," said another girl. "We were cheering for you. Did you hear us?" Suddenly I regained 16 . I decided to 17 track next year. I realized strength and courage aren't always 18 in medals and victories, but in the 19 we overcome (战胜). The strongest people are not always the people who win, 20 the people who don't give up what they love. | ||||
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充油式设备如油浸式电力变压器产生爆炸的直接原因是()。
A.油箱内温度超过当地最高气温
B.因某种原因引起的压力、温度超过允许极限
C.三相缺一相,造成运行电流超标
D.内部产生电弧光作用产生可燃气体
远洋运输是指使用船舶跨越大洋的长途运输的水运方式。
对于二次三次的整系数多项式判断是否可约首选哪种方法?()
A、Eisenstein判别法
B、函数法
C、求有理根法
D、反证法