皮皮学,免费搜题
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搜题
【单选题】
生化分析某有机样品,得知该物质含有碳、氢氧氮磷等基本元素,这种物质最可
A.
淀粉
B.
脂肪
C.
核酸
D.
葡萄糖
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【判断题】压缩机传动带过松需要调整,而过紧不用进行调整。
A.
正确
B.
错误
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【简答题】甲乙两位同学,一位同学完成的是“制作和观察洋葱鳞片叶表皮细胞临时装片”的实验。另一位同学完成的是“制作和观察人的口腔上皮细胞临时装片”的实验。请根据他们所做的实验回答问题。 (1)甲同学在制作临时装片时,在洁净的载玻片中央滴的是一滴生理盐水,他制作的是_________细胞临时装片。 (2)乙同学用显微镜观察他所制作的临时装片时,看到的细胞物像在视野的左上方,要将该细胞物像移到视野中央,他应该向_...
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