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【简答题】
（13分）掌握化学用语和物质的分类是学习化学的基础，请按要求回答下列问题。 （1）填写下列表格 元素的原子序数 原子结构示意图 该元素简单离子符号 11 16 （2）将下列物质的化学式填写在对应类别空格上（注：未提供对应类别物质的，空格不填） 物质：金刚石，氮气，三氧化硫，氧化铝，硫酸镁，醋酸，氢氧化钾，铜，氦气
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举一反三
【单选题】听力原文：M: How to decide the amount of the loan granted to a banker's customer? W: The banker will examine the detailed financial statements of the customer before making a decision. Q: What should a ban...
A.
To make a decision quickly.
B.
To make friends with the customer.
C.
To know the position of the customer.
D.
To examine the details of the financial statements.
【单选题】The following statements about the nanotechnological way and the traditional way of making things are true EXCEPT _____________.
A.
the nanotechnological way differs from the traditional way of making things
B.
the traditional way of making things creates much waste during drilling, sawing,
C.
nanotechnology builds things atom by atom, molecule by molecule
D.
products built in the nanotechnological way are all bottom-up
【单选题】设A与B是两个相似n阶矩阵,则下列说法错误的是( )
A.
a的绝对值等于b的绝对值。
B.
秩(A)=秩(B)
C.
存在可逆阵P,使P-1AP=B
D.
E-A=E-B
【单选题】有一老人与人争吵厮打后,人院检查过程中突然出现口唇发绀,四肢凉,血压下降而死亡,尸检发现,冠状动脉IV级狭窄,心肌变软,其死亡原因最可能是下列哪一项
A.
心肌梗死
B.
脑出血
C.
动脉瘤破裂
D.
肺动脉栓塞
E.
心力衰竭
【单选题】During the trial period, the customer pays a reduced amount to rent the machine.
A.
Right
B.
Wrong
C.
Doesn't sayPART FIVE
【单选题】听力原文：W: Our President, since leaving office five years ago, has spent a huge amount of time promoting AIDS awareness and prevention. M: That is the thing I have been doing. W: I know you just came bac...
A.
Traveling in South Africa to seek medical help.
B.
Promoting awareness and prevention of AIDS.
C.
Visiting clients and signing contracts.
D.
Collecting fund for the new business.
【单选题】During the trial period, the customer pays a reduced amount to rent the machine.
A.
Right
B.
Wrong
C.
Doesn't say
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