皮皮学，免费搜题
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搜题
【单选题】
下列物质分类正确的是A.
CO 2 、CO均为酸性氧化物
B.
氯水、氨水均为混合物
C.
纯碱、火碱均为属于碱
D.
牛奶、醋酸均为胶体
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皮皮学刷刷变学霸
举一反三
【单选题】Speaker A: I sent a package to Dallas two days ago and it still hasn t arrived. My tracking number is 641-24. Speaker B: Ok, Mr. Smith.______but our delivery person said that there was no such address...
A.
Don't be angry,
B.
Stay calm,
C.
Thanks for asking me,
D.
We attempted to deliver it,
【单选题】–John. Father is not feeling well. --I know. A doctor has been sent _______. But he hasn’t turned _______ yet.
A.
for; up
B.
out’ up
C.
for; on
D.
out; on
【多选题】假设当前页面为`http://x.com/bbs/index.html`,以下哪几项url是等价的:
A.
link
B.
link
C.
link
D.
link
E.
link
F.
link
G.
link
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