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【单选题】
人民代表大会制度、政治协商制度等我国具体民主政治制度的实质是( )A.
社会主义民主
B.
权力机关
C.
行政机关
D.
咨询机关
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举一反三
【单选题】A System of Guaranteed Subsistence Minimum A hundred years ago it was assumed and scientifically 'proved' by economists that the laws of society made it necessary to have a vast army of poor and joble...
A.
the slow development of the economy
B.
the fault of the poor and the jobless themselves
C.
the lack of responsibility on the part of society
D.
the large number of uneducated people
【单选题】The author of this passage correlates the fisherman's use of the net to______.
A.
a scientific method
B.
a conceptual notion
C.
a controlled experiment
D.
a replicable event
【简答题】已知可导函数f（x）的导函数为f'（x），且满足f（x）=3x 2 +2xf'（2），则f'（5）=______．
【多选题】期货交易的主要特征是（ ）。
A.
期货合约是由债券市场制定的．在债券市场内进行交易的合约
B.
期货合约是标准化的合约。合约中的各项条款都是标准化的，合约中只有价格一项是通过市场竞价交易形成的自由价格
C.
实物交割率低。期货合约中实物交割量占交易量的比重很小，一般小于5％
D.
期货交易实行保证金制度。交易者不需要付出与合约金额相等的全额货款，只需要付3％～5％的履约保证金
E.
期货交易所为交易双方提供交割服务和履约担保，实行严格的结算交割制度，违约的风险很小
【简答题】SECTION B ENGLISH TO CHINESE Directions: Translate the following text into Chinese. Scientific methodology is based on generating hypotheses and testing them to see if they make sense; in laboratories...
【单选题】According to the passage, _____is the key factor to making 'Nowcasts' a reality.
A.
scientific and technological advances such as radar, or satellites
B.
computer scientist
C.
meteorologists
D.
advanced computer programs
【简答题】给出定义：若函数f(x)在D上可导，即f′(x)存在，且导函数f′(x)在D上也可导，则称f(x)在D上存在二阶导函数，记f″(x)＝(f′(x))′，若f″(x)<0在D上恒成立，则称f(x)在D上为凸函数．以下四个函数在(0， )上不是凸函数的是________． ①f(x)＝sim x＋cos x ②f(x)＝ln x－2x ③f(x)＝x 3 ＋2x－1 ④f(x)＝x...
【单选题】Which of the following is not mentioned as a necessary part to maintain America's scientific leadership?
A.
Money.
B.
Combination of various disciplines.
C.
Joint efforts of the most intelligent scientists.
D.
Favorable academic atmosphere.
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