【題目】(1)凡是均一、穩(wěn)定的液體都是溶液。__________________________________________________。
(2)鹽水是溶液,糖水是溶液,混合在一起,既有糖又有鹽則不是溶液了。___________________。
(3)溶液中只含有溶質(zhì)分子、溶劑分子。___________________________________________。
科目:初中地理 來源: 題型:
【題目】What is _____ favorite color?
A. your mother B. your mothers C. your mother’s
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科目:初中地理 來源: 題型:
【題目】A
Lost & Found
Lost: Found: Schoolbag
My school ID card Is this your schoolbag?
Its number is 2007712 It’s black and white.
My name is Mary Brown. My name is Tony Green.
Please call 6956385. Phone: 2360731
Cindy,
Your red notebook is in the lost and found box.
Mike
【1】Mary’s school ID card number is __________.
A. 236-0731 B. 695-6385
C. 2007712 D. 695-8635
【2】 The schoolbag is __________.
A. green B. white
C. red D. black and white
【3】Mary’s phone number is __________.
A. 695-6385 B. 2007712 C. 236-0731 D. 659-6385
【4】 Tony’s last name is __________.
A. Brown B. Green C. Mike D. Cindy
【5】 Cindy’s __________ is in the lost and found box.
A. school ID card B. schoolbag
C. notebook D. baseball
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科目:初中地理 來源: 題型:
【題目】飛機失事率小,生還率高。2014年3月8日馬航MH370“終結(jié)”于印度洋,無人幸存。2003年2月1日美國“哥倫比亞”號航天飛機失事,有關(guān)專家分析認為,其原因可能是航天飛機外部的石墨在空中脫落,擊中機翼。航天飛機表面覆蓋石墨可以起隔熱和保護作用,這主要是因為石墨( )。
A.能導(dǎo)電
B.密度小
C.熔點高、耐高溫、化學(xué)性質(zhì)穩(wěn)定
D.硬度小,有潤滑作用
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【題目】—Mom, I must go now. Peter is waiting for me at the cinema.
—OK! __________.
A. Good idea B. Good luck
C. Have a good time D. Best wishes
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科目:初中地理 來源: 題型:
【題目】C
It is Sunday afternoon. Mary goes to do the shopping with her mother. Her mother wants to buy some food for supper. Mary wants to buy a new skirt and some school things. They come to a shop.
"What does your shop sell?" Mary asks. "A lot of things." The girl in the shop says. "You can buy food, drinks, clothes in our shop and school things, too."
Mary and her mother go in. There are many people in the shop. Mary finds a nice white skirt.
"How much is the skirt?" Mary asks the girl in the shop.
"It’s eighty yuan."
"That’s too dear. Can I find a cheap one?"
"What about the green one? It looks nice. And it’s only thirty yuan."
"OK, thanks a lot."
"You are welcome."
After that, Mary buys some school things, too. Here mother buys a lot of food, like bread, cakes, meat and fish. They get home very late.
【1】Mary wants to buy a new skirt and _________.
A. some food B. some drinks
C. some clothes D. some school things
【2】Mary goes to do the shopping with her mother on ________.
A. Saturday afternoon B. Saturday morning
C. Sunday morning D. Sunday afternoon
【3】Mary buys a _________ skirt.
A. white B. green C. red D. dear
【4】The white skirt is __________.
A. ¥30 B. ¥110 C. ¥80 D. ¥100
【5】 The green skirt is ___________.
A. nice but dear B. nice and cheap
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【題目】—I want some apples.
—OK. __________.
A. Here it is B. Here you are
C. Give you D. You’re welcome
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【題目】為了探究“乙醇是否能溶于水”,某化學(xué)興趣小組進行了如下實驗:
[操作步驟]
①在盛有2mL水的試管中滴入2~3滴紅墨水(振蕩),然后加入約2mL乙醇(不要振蕩),發(fā)現(xiàn)乙醇與滴有紅墨水的水分層.
②振蕩試管,觀察現(xiàn)象.
③……
[問題討論]
(1)在水中滴入紅墨水的目的是什么?
(2)在操作步驟①中,為了確保乙醇與水有明顯的分層現(xiàn)象,實驗操作時應(yīng)注意什么?
(3)要證明乙醇能溶于水,還應(yīng)進行操作步驟③.寫出實驗操作及現(xiàn)象.
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