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【单选题】
门捷列夫在描述元素周期表时，许多元素尚未发现，但他为第四周期的三种元素留下了空位，并对它们的一些性质做了预测，X是其中的一种“类铝”元素，后来被法国化学家P．E．L．de Boisbaudran发现，并证实门捷列夫当时的预测相当准确．根据元素周期律，下列有关X性质的描述中错误的是（ ）A.
X单质可以与水剧烈反应
B.
通过电解熔融X 2 O 3 可以获得X单质
C.
X元素的金属性比铝元素强
D.
X最高价氧化物对应的水化物具有两性
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【简答题】Translate the following sentences and pay attention to the underlined parts. Television is the transmission and reception of images of moving objects by radio waves. The pupil of the eye responds to t...
【单选题】---“The last one ____ will pay for the meal.” ---“Agreed!”
A.
to arrive
B.
arrived
C.
arriving
D.
arrives
【单选题】下列不属于违反网络职业道德的是?
A.
盗取他人游戏账号
B.
利用攻击软件恶意攻击他人计算机
C.
经他人同意后远程连接他人计算机辅助他人解决问题
D.
利用网上虚拟身份进行欺诈他人的行为
【单选题】The last one _______ will pay the bill.
A.
arrive
B.
arrived
C.
to arrive
D.
arriving
【单选题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75 percent interest per month. Annuity A will pay you on the first of each month while annuity B will ...
A.
These two annuities have equal present values but unequal futures values at the end of year five
B.
These two annuities have equal present values as of today and equal future values at the end of year five
C.
Annuity A has a smaller future value than annuity B
D.
Annuity B has a smaller present value than annuity A
【简答题】You are comparing two annuities which offer quarterly payments of $2,500 for five years and pay 0.75% interest per month. Annuity A will pay you on the first day of each month while annuity B will pay...
相关题目：
【单选题】下列不属于违反网络职业道德的是?
A.
盗取他人游戏账号
B.
利用攻击软件恶意攻击他人计算机
C.
经他人同意后远程连接他人计算机辅助他人解决问题
D.
利用网上虚拟身份进行欺诈他人的行为
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