She is ___ at all the subjects, and she

2011年，某地区有54310人参加中考，将54310用科学记数法（保留2个有效数字）表示为（　　）

A．54×10³

B．0.54×10⁵

C．5.4×10⁴

D．5.5×10⁴

下列各项组合中，能准确判断酸中毒性质严重程度和代偿情况的是（）

A.动脉血和尿的pH值

B.动脉血pH值和HCO^-₃

C.动脉血和静脉血pH值

D.动脉血和静脉血PaCO₂

E.静脉血和尿的pH值

档案统计工作的基础是( )

A．档案登记

B．档案标引

C．档案著录

D．档案检索

正面二传中主要是传（）球。

A、调整快

B、各种后排进攻

C、集中于拉开

D、背传

A 13-year-old visits the school nurse because he’s experiencing back pain, fatigue, and dyspnea. The nurse suspects that the child may have scoliosis. The nurse should first（）

A. send the child home to recover.

B. inspect the child for uneven shoulder height or uneven hip height.

C. arrange for the child to have spinal X-rays as soon as possible.

D. ask the child’s parent to take him to a physician immediately.