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【简答题】
一个包括10个题目的测验，信度为0.50，若增至50个题目，其信度将是多少?
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反馈参考答案：
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】The United States up its satellite until January 31,1958. [ ]
A.
sent
B.
didn't send
C.
hasn't sent
D.
wasn't sent
【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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