XYZ会计师事务所承接了乙上市公司2010年度的财务报表审计业务，派出了A注册会计师

Jack is an eleven-year-old boy. He has a father, a mother, a grandfather and two brothers in his family. Jack is the youngest (年龄最小的). One of his brothers, Tim, is fourteen years old. The other brother, Mike, is fifteen years old. What’s eleven and fourteen and fifteen? That is Jack’s father John’s age. Jack’s mother is very young. She gives birth to (生下) Jack when she is twenty-five years old. Jack doesn’t know his grandfather’s age. He is very old but very healthy. 

小题1:There are seven people in Jack’s family.

小题2:Jack doesn’t have a sister.

小题3:John is thirty years old.

小题4:Jack’s mother is twenty-five years old.

小题5:Jack’s grandfather isn’t old and he is healthy.

 ---I’m a little weak in Maths. I don’t know how to improve it.

--- Why not __________ Daniel for help? He’s very good at it.

A．ask

B．asks

C．asking

D．to ask

女性，38岁，反复发作右上腹疼痛3年。1天前进食油腻食物后腹痛，继之高热39.2℃，疼痛向右肩背部放射，无黄疸，来院急诊。体格检查：右上腹压痛、反跳痛。为迅速作出诊断，下列哪项检查最有价值（）。

A.肝功能检查

B.急查血尿淀粉酶

C.血培养+药敏

D.B型超声检查

E.腹腔穿刺

管道防腐的表面清理一般可分为（）。

A．除油

B．除菌

C．除锈

D．酸洗

呼吸道疾病的经常性预防工作有哪些内容？