國中・其他 解答

若 25x2+ax+36 為一個完全平方式,則 a 的值是多少?

下列是用配方法解 4x2+5x-3=0 的過程: 5 3 第一步:x2+ x= 4 4 5 5 3 5 第二步:x2+ x+( )2= +( )2 4 2 4 2 5 28 第三步:(x+ )2= 2 4 5 第四步:x+ = 7 2 5 ∴x=-  7 。找出哪一步開始發生錯誤? 2

下列哪一個是一元二次方程式? 1

I go shopping outside for long. Mina : Look! Many people are here. Everyone __(37)__ wearing warm 39.

Man : Sure. It’s near the temple, __(35)__ the post office. 37.

between 36.

coat because I can buy them __(33)__ low prices. 33.

How are you plan to use the money? Mina : I will spend two thousand dollars __(32)__ a pair of shoes and a 32.

I couldn’t find my bag. I think I _____ it.

The teacher asked the students _____ quiet in class.

Wendy paid NT 500 _____ the shirt _____ card.

Bertha : What did you do last night? Linus : We went _____ near the lake.

It _____ Jessic two hours _____ her report last night.

Hank : _____ the price of the toys? Jay : They are one thousand dollars.

We have a test tomorrow. It _____ an important one.

_____ of the jeans in this store are blue.

This was his first _____ of living away from his family.

Why is the picture _____ the walls?

Betty : How do you go to school? Tom : I go to school _____ a bus.

The _____ of the money is 500 dollars.

Go straight _____ one block and turn left _____ Station Road and Third Street. The bookstore is on your right.

The man went to the _____ to visit his friend who was hurt in a car accident.

若已知四種元素中,有一種元素為硫,則根據上述結果推測應該是哪一種元素?

哪些元素不具有延性及展性?