NO PLANS FOR THE HOLIDAYS?

Special Story Time for All Lower Primary Pupils

SCHOOL LIBRARY

READING ROOM

June 6,2 p.m. —3 p.m.

Mr.Stephen Keene will impress you with stories from his famous New Kids Next Block series.

FREE ADMISSION

LEARN HOW TO PLAY THE GUITAR IN 4 EASY LESSONS!

Venue: Music Room

Time: 9 a.m. —12 p.m.

Dates: June 6,13,20,27

Instructor: Miss Katsumi from Japan

Fees: $ 40 for 4 lessons *

($ 20 for members of the school band and school choir)

Register with Mrs. Mary Mi , the Choir Mistress, NOW.

*It is compulsory(强制性的) for students who sing up to attend ALL four lessons.

JOIN THE GEOGRAPHY CLUB'S TWILIGHT CRUISE(黄昏巡游)

June 19,5 p.m. —8 p.m.

·View Singapore's wonderful skyline by night.

·Cruise past Kusu Island and Pulau Tekukor (Dove Island)

·Enjoy a great dinner under the starlit sky.

HURRY! VACANCIES(空缺) ONLY FOR THE 1ST 20 PUPILS WHO SING UP.

Get your consent forms(同意书) from Miss Yu and return the forms with your payment($20) by 30 May.

* If there are more than 20 pupils interested in the cruise,priority (优先权) will be given to Geography Club*

    Kate's father took her to the hospital to see her one-day-old baby brother. They drove there straight from school. Kate had never been inside a hospital before.  ①This was a new experience for her.

    At the gate there was a large sign listing all the departments of the hospital, with arrows (箭头) showing how to find them. When Kate saw the A&E department(急救室), she asked,“What do those letters stand for?”“Accident and emergency,” replied her father,

②“Last spring, I took our sister there because she fell off her bike,”

（注：在解题过程中，你也可以阅读后面的材料）

附：阅读材料

   任何一个一元二次方程的根与系数的关系为：两根的和等于一次项系数与二次项系数的比的相反数，两根的积等于常数项与二次项系数的比．

   即：设一元二次方程ax²+bx+c=0的两根为x₁，x₂，

   则：x₁+x₂=﹣ $\frac{b}{a}$ ，x₁•x₂= $\frac{c}{a}$

   能灵活运用这种关系，有时可以使解题更为简单．

   例：不解方程，求方程x²﹣3x=15两根的和与积．

   解：原方程变为：x²﹣3x﹣15=0

∵一元二次方程的根与系数有关系：x₁+x₂=﹣ $\frac{b}{a}$ ，x₁•x₂= $\frac{c}{a}$

∴原方程两根之和=﹣ $\frac{-3}{1}$ =3，两根之积= $\frac{-15}{1}$ =﹣15．

如图所示，倾角为θ的斜面体C置于水平面上，B置于斜面上，通过细绳跨过光滑的定滑轮与A相连接，连接B的一段细绳与斜面平行，A、B、C都处于静止状态．则（   ）