细菌感染时,外周血白细胞计数增加明显,这主要是由于________和________一引起白细胞从骨髓中释放加速,而且相对不成熟的杆状核中性粒细胞比例增加,称为________。
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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