若关于x的不等式ax2-bx-1≥0的解集为[-12，-13]，则a+b=___

测量R-R间期为0.8秒，此时的心率为（）。

A.110

B.100

C.80

D.75

E.90

牙周炎引起牙齿松动的因素是（）。

A.牙槽骨吸收较多

B.外伤

C.咬合创伤

D.急性或亚急性牙周韧带炎症阶段

E.A+C+D

填补下面名句的空白外或按要求填空。（8分）

(1)生，亦我所欲也；义，亦我所欲也。二者不可得兼，                      。

(2)                  ，地利不如人和。

(3)所以动心忍性，                          。

(4)                           ，万钟于我何加焉! 

(5)《生于忧患，死于安乐》中对历史上大量亡国事实的原因进行高度概括的句子是：                            ，                             。

(6)2010年10月25日，是抗美援朝60周年纪念日。抗美援朝战争的胜利，有力地说明了决定战争胜负的不是武器优劣，而是战争正义与否，正如《(孟子)两章》中所说的那样“                                  ，                          。

正常情况下，外周血中中性杆状核细胞与分叶核细胞的比值为（）

A.1：14

B.1：13

C.1：12

D.1：11

E.1：10

阅读理解。

      Mrs. Blake teaches English in a large school in the inner area of a big city on the west of coast. Even

since she was a young girl,she has wanted to become a teacher. She has taught eight years now and hasn't

changed her mind. After she graduated from high school, she went on to college. Four years later, she

received her bachelor's degree (B A) in English and her teaching certificate (证书). Then she went to teach

in the secondary schools of her state. In the summers, Mrs. Blake takes more classes; she hopes to get a

master's degree (M A). With an MA, she will receive a higher salary and if possible, she hopes to get a doctor's

degree as well. The school day at Mrs. Blake's high school, like that in many high schools in the United States,

is divided into one hour each. Mrs. Blake must teach five of these periods. During her free period, which for

her is from 2 to 3 P.M., Mrs. Blake must meet with parents, make out examinations, check assignments at all,

Mrs. Blake works continuously from the time she arrives at school in the morning till the time she leaves for

home late in the afternoon.

1. How long is it since Mrs. Blake graduated from middle school? [      ]

A. four years

B. eight years

C. twelve years

D. twenty years

2. According to the article, which is the right order of the degrees a person can receive after going to

    university? [ ]

A. a doctor's degree - a bachelor's degree - a master's degree

B. a bachelor's degree - a master's degree - a doctor's degree

C. a master's degree - a bachelor's degree - a doctor's degree

D. a bachelor's degree - a doctor's degree - a master's degree

3. How many degrees has Mrs. Blake achieved so far? [ ]

A. one

B. two

C. three

D. none

4. Which of the following sentences is not true? [ ]

A. Mrs. Blake teaches in the inner area of big city on the east of the United Sates

B. Mrs. Blake has turned her wish of becoming a teacher into reality.

C. Mrs. Blake is still studying in her holidays in order to get higher degrees.

D. The working hours in the school where Mrs. Blake works are similar to those of many other high schools in the states.