分组是数据透视表中常用的功能。对日期型数据可以根据需要将日期按年、季度或月分组。
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The new car has enjoyed___success since its launch.
A. some
B. a few
C. few
D. modest
--Where is Mr. Zheng today?--He is away on___for a trade talk in Guangzhou.
A. business
B. work
C. job
D. holiday
淋巴结内含B细胞的主要区域是:
A. 淋巴小结
B. 深层皮质
C. 被膜下窦
D. 小梁周窦
E. 髓窦
脾的胸腺依赖区是:
A. 脾小体
B. 脾索
C. 副皮质区
D. 动脉周围林巴鞘
E. 边缘区