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【单选题】
如图中的甲、乙、丙分别代表人体液中物质交换、食物网中能量流动、生态系统碳循环的示意图.据此，下列说法中正确的是( )。
A.
甲图D与B间不能直接进行物质交换，D与A之间才能直接进行物质交换
B.
因捕食关系而建立的食物链中，能量最少的是丙图中的B所处的营养级
C.
从研究内容来看，甲和乙、丙分别属于生命系统的个体水平、群落水平和群落水平
D.
B取食A占的比例由1/2调整为5/6，则A供养的B数量是原来的2.2倍(能量传递效率按10%计算)
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举一反三
【单选题】材料吸水后,将使其( )提高。
A.
耐水性
B.
强度
C.
密度
D.
导热系数
查看完整题目与答案
【单选题】( ) are mutual funds that invest in one country only.
A.
ADRs
B.
single-country funds
C.
international ETFs
D.
none of the above
查看完整题目与答案
【单选题】会计要素在特定会计期间增加和减少的金额,分别称为账户的“本期增加发生额”和“本期减少发生额”,二者统称为账户的( )
A.
本期变动额
B.
本期发生额
C.
本期余额
D.
本期计算额
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【单选题】The advantage of mutual funds is that they
A.
require no cash up front.
B.
give investors with relatively small amounts of cash to invest access to large-denomination securities.
C.
always yield the highest returns.
D.
both A and B of the above.
查看完整题目与答案
【单选题】The major advantage of mutual funds is that
A.
they allow people with limited funds to diversify.
B.
they encourage households to spend their money on current consumption.
C.
fund managers are replaced by household administrators.
D.
always use index funds to limit investor risk.
查看完整题目与答案
【简答题】会计要素在特定会计期间增加或减少的金额,统一称为账户的( )。
查看完整题目与答案
【多选题】关于材料与水有关的性质的说法，正确的有( )。
A.
材料中所含水的质量与干燥状态下材料的质量之比称为材料的含水率
B.
粗大孔隙材料的吸水率较高
C.
木门窗在潮湿环境中由于吸湿往往会导致不易开关
D.
保温材料吸收水分之后将会降低其隔热性能
E.
一般而言材料吸湿后会增加重量，并使材料强度提高
查看完整题目与答案
【单选题】Studies of the performance of professionally managed mutual funds find that these funds:
A.
do not outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis.
B.
do not outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
C.
outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis.
D.
outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
E.
Both outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis; and outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
查看完整题目与答案
【单选题】The price of the mutual funds is mainly determined by
A.
the total value of the funds
B.
the supply and the demand
C.
the net value of assets
D.
the liability of the funds
查看完整题目与答案
【单选题】It is claimed that a secondary advantage of mutual funds is that
A.
an   investor can avoid investment charges and fees.
B.
they   give ordinary people access to loanable funds for investing.
C.
they   usually outperform stock market indexes.
D.
they   give ordinary people access to the skills of professional money managers.
查看完整题目与答案
相关题目：
【单选题】材料吸水后,将使其( )提高。
A.
耐水性
B.
强度
C.
密度
D.
导热系数
查看完整题目与答案
【单选题】( ) are mutual funds that invest in one country only.
A.
ADRs
B.
single-country funds
C.
international ETFs
D.
none of the above
查看完整题目与答案
【单选题】会计要素在特定会计期间增加和减少的金额,分别称为账户的“本期增加发生额”和“本期减少发生额”,二者统称为账户的( )
A.
本期变动额
B.
本期发生额
C.
本期余额
D.
本期计算额
查看完整题目与答案
【单选题】The advantage of mutual funds is that they
A.
require no cash up front.
B.
give investors with relatively small amounts of cash to invest access to large-denomination securities.
C.
always yield the highest returns.
D.
both A and B of the above.
查看完整题目与答案
【单选题】The major advantage of mutual funds is that
A.
they allow people with limited funds to diversify.
B.
they encourage households to spend their money on current consumption.
C.
fund managers are replaced by household administrators.
D.
always use index funds to limit investor risk.
查看完整题目与答案
【简答题】会计要素在特定会计期间增加或减少的金额,统一称为账户的( )。
查看完整题目与答案
【多选题】关于材料与水有关的性质的说法，正确的有( )。
A.
材料中所含水的质量与干燥状态下材料的质量之比称为材料的含水率
B.
粗大孔隙材料的吸水率较高
C.
木门窗在潮湿环境中由于吸湿往往会导致不易开关
D.
保温材料吸收水分之后将会降低其隔热性能
E.
一般而言材料吸湿后会增加重量，并使材料强度提高
查看完整题目与答案
【单选题】Studies of the performance of professionally managed mutual funds find that these funds:
A.
do not outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis.
B.
do not outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
C.
outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis.
D.
outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
E.
Both outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding refutes the semistrong form of the efficient market hypothesis; and outperform a market index. Assuming mutual fund managers rely primarily on public information, this finding supports the semistrong form of the efficient market hypothesis.
查看完整题目与答案
【单选题】The price of the mutual funds is mainly determined by
A.
the total value of the funds
B.
the supply and the demand
C.
the net value of assets
D.
the liability of the funds
查看完整题目与答案
【单选题】It is claimed that a secondary advantage of mutual funds is that
A.
an   investor can avoid investment charges and fees.
B.
they   give ordinary people access to loanable funds for investing.
C.
they   usually outperform stock market indexes.
D.
they   give ordinary people access to the skills of professional money managers.
查看完整题目与答案