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【简答题】
先化值：已知A=4a 2 +5b，B=﹣3a 2 ﹣2b，求2A﹣B的值，其中a=﹣2，b=1．
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举一反三
【单选题】The StanfordBinet intelligence test is comprised of multiple choice questions.
A.
Y
B.
N
C.
NG
【单选题】This test a number of multiple -choice questions.
A.
composed of
B.
composes in
C.
consists of
D.
consists in
【简答题】A．Because multiple choice questions are easier to design than long general ones. B．Because by asking multiple choice questions one can collect more detailed information. C．Because multiple choice ques...
【简答题】The test ______ a number of multiple choice questions. A) composes of B) composes in C) consists of D) consists in
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