脾脏有极丰富的血液循环,又是体内最大的____,内含大量的淋巴细胞和巨噬细胞,其功能与结构上又与____有许多相似之处,故脾又是一个重要的____器官。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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