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【单选题】
( )技术是生物工程的核心技术,它能带动其他技术工程的发展。A.
基因工程
B.
细胞工程
C.
发酵工程
D.
酶工程
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【单选题】While, almost every department of the federal government is concerned about and involved with some aspects of education, and【C1】______.federal government influence is an important【C2】______in educatio...
A.
when
B.
while
C.
since
D.
as
【简答题】As far as foreign trade is concerned, the following three risks are covered _____________ an insurance policy, namely, F. P. A., W. P.A. and All Risks.
【单选题】The news ________ your hometown. [ ]
A.
is concerned about
B.
is concerned in
C.
concerns
D.
concerns with
【简答题】Shyness is the cause of much unhappiness for a great many people. Shy people are anxious and self-conscious; that is, they are excessively concerned with their won appearance and actions. Worrisome th...
【简答题】On a particular day, the spot rate between Czech koruna (CKR) and the U.S. dollar is CKR30.35/$, while the interest rate on a one-year financial instrument in Czech is 7.5% and 3.5% in U.S. (8 credits...
【单选题】关于回归方程自变量子集对拟合优劣的影响,以下说法正确的是
A.
自变量子集在扩大时，残差平方和随之增大，复决定系数也随之增大。
B.
自变量子集在扩大时，残差平方和随之减少，复决定系数也随之减少。
C.
自变量子集在扩大时，残差平方和随之减少，而复决定系数随之增大。
D.
自变量子集在扩大时，残差平方和随之增大，而复决定系数随之减少。
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