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问题 单项选择题

石瘿的病因是

A．马齿苋
B．桃红四物汤
C．除湿胃苓汤
D．小柴胡汤
E．增液汤

答案

参考答案：D

写作题

上个星期天晚上，你和家人一起去看京剧。谈谈去之前你的心情及看过之后的体会。词数60个左右。

提示词语：look forward to ... , national opera, express Chinese culture, famous stories, facial paintings, wonderful gestures and fighting, have a nice evening ...

开头已给出，不计入总词数。

Last Sunday evening, my father, mother and I went to see Beijing Opera ...

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单项选择题

SQL的全局约束是指基于元组的检查子句和 (17) 。

A．非空值约束

B．域约束子句

C．断言

D．外键子句
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