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【判断题】
光纤导光的条件是包层的折射率n2小于纤芯的折射率n1A.
正确
B.
错误
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举一反三
【单选题】Who is the person painted in the Mona Lisa?
A.
A woman who likes paintings.
B.
A woman who was a silk merchant.
C.
The wife of a wealthy merchant.
D.
The wife of the painter himself.
【单选题】. Who is the person ____is talking about the accident ___happened on Highway 104?
A.
which, which
B.
who, what
C.
that, that
D.
what, what
【单选题】Who is the person ___ is standing at the gate of Beijing Tourism Tower?
A.
a. who
B.
b. that
C.
c. which
D.
d. whom
【简答题】Whois the person painted in the Mona Lisa ?A. A woman who likes paintings. B. A woman who was a silk merchant. C. The wife of a wealthy merchant. D. The wife of the painter himself.
【单选题】Who is the person is standing at the gate of Beijing Tourism Tower?
A.
who
B.
that
C.
which
D.
whom
【简答题】Who is the person _____ is standing at
the gate?A. which B. that C. whom D. who
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