下列哪项不属于五迟五软的病因A．先天禀赋不足 B．难产、窒息 C．生后患急慢性疾病

已知点M（3，1），直线ax-y+4=0及圆（x-1）²+（y-2）²=4．

（1）求过M点的圆的切线方程；

（2）若直线ax-y+4=0与圆相切，求a的值．

语法填空。

     One afternoon,a little boy went into a drug store,reached for a soda carton (硬纸箱)and

pulled it over to the telephone.He stood 1.________the carton so that he could reach the

phone 2.________started to dial the phone numbers.

     The store owner observed and listened to the conversation:

     Boy:"Lady,can you give me the job of 3.________(cut)your lawn?"

     Woman (at the other end of the phone line):"I have already hired someone."

     Boy:"But I will do 4.________job for half the price."

     Woman:"That's great,but I'm very satisfied with my present employee."

     Boy:"Lady,5.________you give me the chance,I'll even sweep your sidewalk for free."

     Woman:"Oh,I'm sorry."

     Hearing this,the little boy replaced the phone 6.________(receive) with a smile on his

face.The store owner then walked over to the boy and said to 7.________,"I appreciate

your positive spirit and would like 8.________(offer) you a job."

     But the boy refused."I made the call not to apply for a job,but to check my performance

at the job I have already had.I am the one who 9.________(work)from 10:00 to 11:30 this

morning," the little boy explained 10.________the store owner.

“印尼大地震”、“汶川大地震”、“智利大地震”、“日本大地震”……人们戏言“地球进入了地震模式”，下列关于地震说法错误的是（）

A、主要分布在环太平洋地带

B、主要分布在沿海地带

C、主要分布在地壳比较活跃的地带

D、是板块相互运动的结果

根据《左传》的记载，出自于“宫之奇力谏假道”的是以下哪一个成语？（）

A.完璧归赵

B.唇亡齿寒

C.其乐融融

D.朝闻夕死