已知等差数列前n项和为Sn．且S13＜0，S12＞0，则此数列中绝对值最小的项为

单词拼写（10分）

小题1:December is the t_______ month of the year.

小题2:We have an Art F_________ every year.

小题3:Is this your pencil?--- No , John has one like this. Maybe（可能）it’s h______.

小题4:May I borrow your d_________? Mine is at home.

小题5:Doing sports every day is a good h______.

小题6:She can’t go to school. She is too young. She is o______ three years old.

小题7: We have a new school l_______,and many books are in it.

小题8:It’s 7:50 now.Let’s go! We are l______ for school.

小题9:It’s 10 yuan! You buy it at a good p________ .

小题10:I can’t find my l_______ring, I’m very sorry.

健康成人白细胞正常值为( )

A．(5～10)×10 9/L

B．(4.5～11)×10 9/L

C．(4.5～10)×10 9/L

D．(4～10)×10 9/L

E．(4～11)×10 9/L

“通因通用”适用于下列哪种病证 （）

A.脾虚泄泻

B.肾虚泄泻

C.食积泄泻

D.寒湿泄泻

E.肠虚滑脱

废水的过滤流速一般为（）。

A.0.2～0.4米/秒

B.0.4～0.7米/秒

C.0.8～1.0米/秒

D.0.2～0.5米/秒

三相电能计量的接线方式中，A、B、C接线为正相序，那么C、B、A就为逆相序。