Harvard,_____________ in 1636, is one of

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问题选择题

Harvard,_____________ in 1636, is one of the most famous universities in the USA.[ ]

A. which is set up

B. which is built

C. which was

D. which was

答案

答案：D

多项选择题

关于腺样囊性癌的描述不正确的是()

A．最常见于下颌下腺、舌下腺

B．颈淋巴结转移率高

C．较少出现神经症状

D．肿瘤浸润性极强

E．远处转移以肺为最多见

填空题

（1）向NaHSO₄溶液中逐渐加入Ba(OH)₂溶液至中性，写出反应的离子方程式：______________________________________________。

（2）在以上中性溶液中，继续加入Ba(OH)₂溶液至沉淀完全，此步的离子方程式为： ____________________________________________。