國中 解答
共 5127 題
11 公克重，向右
靜止於桌面上的某物體10公克重，如附圖所示，今在物體兩側分別施以20公克重與9公克重的水平力，發現物體仍靜止不動，則該物體所受的摩擦力大小與方向應為何？
乙丙甲丁
已知甲、乙、丙、丁四種溶液的氫離子濃度如表所示，則水溶液之pH值由大至小排列的次序，下列何者正確？
can ; do
Judy: What _______ you do? Shelly: I can swim. I _______ it every day.
I play basketball.
Tom: What do you do in your free time? John:_______
on Tuesday
Allen: When is the concert? Jenny: It's ________. I can't wait to see Mayday.
believe
Irene says she cooks dinner every day, but I don't ______ her.
many
How ______ apples are there on the table? There are three.
How much is it?
Jessica: This bag is nice. _________ Sandy: It's three hundred dollars.
goes
Peggy _____ to supermarket after work every night. She needs to prepare dinner for her family.
terrible
There is a lot of trash in the living room. That's ______.
Yes, I went on a picnic with my family.
Nora: Did you enjoy your weekend last week? Sara: _______
is
There ________ a lot of rain in summer in Taiwan. I don't like it at all.
酸鹼中和反應中加入「酚酞」
下列「 」內的物質，何者不是催化劑？
兩物體密度：B＞A
A、B為兩相同質量的物體放入水中，兩物體靜止在水中的狀況如附圖所示 (水的密度=1.0g/cm3) ，試問關於兩物體的敘述，何者正確？
洗手用的肥皂，可以使油汙與物體分離
化學反應在生活中時常可見，不只在實驗室中，下列選項的化學成分應用，何者不屬於氧化還原反應？
seldom
I ______ eat out. My parents often cook for us at home.
When ; at
Sammy: _______ do you get up every day? Jane: I get up ________ six thirty.
只有小林敘述合理
小顏與小林分別提出自己的關於反應速率的敘述，試問兩人的敘述是否合理？ 小顏：若將固體反應物搗碎，會減少表面積，因此反應速率會變慢。 小林：溫度愈高，反應物粒子具有的能量愈大，反應速率也會愈大。
.甲＞乙＞丙
在室溫下，甲溶液的pH值為3，乙溶液的pH值為7，丙溶液的pH值為11，則按[H ]的高低排列，下列順序何者正確？
平衡前水蒸發速率大於水蒸氣凝結速率
如附圖所示，在定溫下，將水倒入玻璃杯內，並以玻璃片蓋住。靜置一段時間後，發現玻璃杯底部的水量減少了，但到一定程度就不再變化；則關於玻璃杯中的系統平衡，下列敘述何者正確？
Monday
In most countries, ____ is the first day for people to go to work. That’s why many people feel blue after the weekend.
germs
Wash your hands before you eat. There are many ______ on your fingers.
There are some sandwiches on the tabl
David: I'm so hungry. Is there anything to eat? John: Yes. _________
is
Basketball ______ fun. I play it with my friends every day.