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【多选题】
我国的出口退(免)税有下列几种方法( )。A.
出口免税不退税
B.
出口不免税也不退税
C.
出口免税并退税
D.
出口不免税退税
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举一反三
【单选题】To succeed in a scien:tific experiment, ______.
A.
one needs being patient person
B.
patience is to need
C.
one needs to be patient
D.
patience is what needed
【单选题】America's emphasis on the importance of education for everyone has spurred scien-tific research.
A.
encouraged
B.
endangered
C.
endorsed
D.
enlarged
【单选题】下列化学方程式中,不能用离子方程式 Ba 2+ +SO 4 2- ==BaSO 4 ↓表示的是( )。
A.
Ba(NO 3 ) 2 +H 2 SO 4 ==BaSO 4 ↓+2HNO 3
B.
BaCl 2 +Na 2 SO 4 ==BaSO 4 ↓+2NaCl
C.
BaCO 3 +H 2 SO 4 ==BaSO 4 ↓+H 2 O+CO 2 ↑
D.
BaCl 2 +H 2 SO 4 ==BaSO 4 ↓+2HCl
【简答题】Dear all, Please read Professor Hume's email about his next lecture on Rosa Parks. Susan Miller Secretary ＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊＊Dear Susan, Please forward this message to students of m...
【单选题】Esthetics is a science that tries to make clear the laws and principles of _____________ .
A.
design
B.
beauty
C.
ornament
D.
decoration
【单选题】下列化学方程式中，不能用离子方程式H + +OH - =H 2 O表示的是（ ）
A.
HCl+NaOH=NaCl+H 2 O
B.
Ba（OH） 2 +2HNO 3 =Ba（NO 3 ） 2 +2H 2 O
C.
Cu（OH） 2 +2HNO 3 =Cu（NO 3 ） 2 +2H 2 O
D.
NaOH+NaHSO 4 =Na 2 SO 4 +H 2 O
【单选题】According to the author，people are suspicious of the professional judgment of scientists because （ ）．
A.
their pronouncements often turn out to be wrong
B.
sometimes they hide the source of their research funding
C.
some of them do not give priority to intellectual honesty
D.
they could be influenced by their association with the project concerned
【单选题】It is a curious paradox that we think of the physical sciences as 'hard', the social sciences as 'soft', and the biological sciences as somewhere in between. This is interpreted to mean that our knowl...
A.
implication
B.
contradiction
C.
interpretation
D.
confusion
【单选题】In the eighteenth century the heading of “natural philosophy” encompassed all of the sciences.
A.
category
B.
teachings
C.
ideology
D.
leaders
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