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【单选题】
He w i ll soo n vis i t Dar w in. He will visit Dar w in .A.
quickly
B.
for a short time
C.
shortly
D.
in a hu r ry
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举一反三
【单选题】Both sides agree to establish a _______ zone between the south and north.
A.
midst
B.
mild
C.
mention
D.
neutral
【单选题】—I think rice is better than noodles． —I don’t you. They are both healthy foods．
A.
agree to
B.
agree on
C.
agree with
D.
agree about．
【单选题】逆转录病毒复制的特点是
A.
病毒的基因组是DNA
B.
病毒基因组是分节段RNA
C.
病毒复制利用病毒的RNA依赖RNA聚合酶
D.
病毒复制过程中，以病毒基因组RNA为模板合成DNA复制中间体后再转录为RNA
E.
病毒复制过程中，以病毒基因组RNA模板直接合成RNA
【单选题】Foreign propagandists and the author both agree that Americans ______.
A.
are disunited
B.
have no common tradition
C.
come from varied backgrounds
D.
have the courage of their convicitons
【单选题】What do both speakers agree on?
A.
They are both fluent in foreign languages.
B.
They adore living in the Far East.
C.
They have much to learn about computers.
D.
They are overworked and underpaid.
【单选题】For the Greek mariners and fishermen, ________ could be both a trouble-maker and a helper.
A.
Zeus
B.
Pandora
C.
Poseidon
D.
Heracles
【简答题】简述单符号信源变长码编码定理
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