单项选择题

SELECT子句中指定的列必须是（）子句中指定的列，或者和聚合函数一起使用

A.GROUPBY
B.ORDERBY
C.HAING
D.WHERE

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Reading Out
Fill in the blanks without referring to the original text. Then check your answers against the original. After that, read the passage aloud until you can say it from memory.

A team of 1) discovered that there are strong 2) between how boys and girls are 3) : While daughters in their study were often kept 4) to their parents, sons were 5) to move on their own and to develop 6) .

答案： (1)
researchers ...

单项选择题

位于肝十二指肠韧带内的血管是（）

A、肝总动脉
B、胆囊动脉
C、门静脉
D、肝静脉
E、脾静脉