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【判断题】
各种组织培养类型都需要无菌操作并且需要在人工培养基上培养,只是需要的外不同,途径与培养方法不同。A.
正确
B.
错误
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【简答题】From far out in space, Earth looks like a blue ball. Since water covers three-fourths of the Earth’s suce, blue is the color we see most. The continents look brown, like small islands floating in t...
【判断题】The white surface is the lead viewed when the lead oxide is scratched. 这句话的意思是 白色的表面是刮去 金属 铅 后看到的 氧化铅 。
A.
正确
B.
错误
【简答题】Now, here's a view of a little dig the ______Lander did in 2008, showing that just below the suce of the soil is ice -- that white stuff is ice. In the second picture, which is four days later than...
【判断题】The white surface is the lead viewed when the lead oxide is scratched.这句话的意思是白色的表面是刮去金属铅后看到的氧化铅。
A.
正确
B.
错误
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