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石莼的生活史中出现2种植物体,其中是二倍体,是单倍体。

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褐藻门细胞壁内层是,外层是。因其所含含量最高,使得藻体呈现褐色。

题目见教材P185-186 练习题 2要求:编制20×7年度甲公司合并工作底稿上的相关调整与抵销分录。

Fill in the blanks with the expressions given below. Change the form where necessary. Each expression can be used only once.1.She held her hand above her eyes to 1) ____them 2) _____the sun so that she could see more clearly the man in front of her.

Fill in the blanks with the expressions given below. Change the form where necessary. Each expression can be used only once.2. The boy studied the signs for over an hour, but still could not 3) ____them, so he turned to his teacher for help.

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