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【单选题】
有关生命起源与进化的叙述，错误的是（ ）A.
原始生命诞生的标志是原始新陈代谢和个体增殖
B.
生物进化的最直接证据是同源器官的发现
C.
模拟实验法为验证生命化学进化的可能性提供了证据
D.
现代综合进化理论是在自然选择学说基础上形成的
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举一反三
【简答题】When the sun's rays hit the earth , a lot of heat is _____ back into space.
【单选题】初始观察到的影动是顺动,加了+4.00D以后,水平方向上的影动中和了,竖直方向上仍然是顺动,拿掉+4.00D的镜片后,加到+5.00D时竖直方向影动中和了,请问该患者检影验光结果是多少?
A.
+4.00/+5.00×90
B.
+4.00/+5.00×180
C.
+4.00/+1.00×90
D.
+2.50/+1.00×90
E.
+2.50/+5.00×90
F.
+2.50/+1.00×180
【简答题】翻译句子，注意reflect在句中的意思。 1.A man's actions reflect his thoughts. 2. When the sun's rays hit the earth, a lot of heat is reflected back into space. _______________________
【简答题】When the sun's rays hit the earth , a lot of heat is _____ (反射)back into space.
【单选题】When the sun's rays hit the earth, a lot of heat is _____ back into space.
A.
considered
B.
impressed
C.
reflected
D.
affected
【单选题】Which statement was NOT mentioned about viewing an eclipse?
A.
Sunglasses block out only a limited amount of the sun's ultraviolet rays that can damage the eye.
B.
Sunglasses can only filter harmful rays during total solar eclipses at their greatest magnitude.
C.
Sunglasses tend to cause the center of the eye to enlarge allowing in more intense light.
D.
Sunglasses should be used when any part of the sun is visible.
【简答题】Damage to Ozone Layer Gets Worse In the middle of winter, when snow is falling in many parts of the United States, scientists have sounded a warning to people who plan to spend many hours in the sun t...
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