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【简答题】
如图是汽车轮胎示意图,请结合图回答下列问题. (1)在汽车轮胎组成中属于金属材料的是 _________ .属于有机物的是 _________ ,但专家建议充入稀有气体可以减少轮胎受热时体积膨胀,减少爆胎机会,请写出一种稀有气体的化学式 _________ . (2)轮胎所用胎圈一般用合金材料,没有用纯金属,你能解释其中原因吗? _________ . (1)合金胎图(以铝合金为例主要含)一般不宜接触酸性物质(以盐酸为例),请你用化学方程式解释其中原因 _________ .
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【简答题】>Trump impeached by US House 遭美众议院 Donald Trump on Wednesday became the __1__ US president to be impeached as the House of Representatives formally charged him with abuse of power and obstruction...
【简答题】Today's Social Security programhas its roots in the Great Depression of the 1930s. With ____1____ unemployed,many Americans lived in poverty, and many elderly workers lost all theirpension funds when ...
【简答题】直杆的两个主要的几何因素为(__)和,(__),
【单选题】The American Congress consists of ______.
A.
the House of Representatives and the Senate.
B.
the Senate and the Cabinet
C.
the House of Commons and the House o f Lords
D.
the Senate and the Pr e sident
【判断题】审视自己的内心并发现自己心中的“内在小孩”,给自己一次重生的机会,是恋爱当中最重要的意义。
A.
正确
B.
错误
【简答题】用于电气图样或其他文件以表示一个设备或概念的图形、标记或( ),统称为电气图形符号 图形符号的含义和组成 图形符号通常由基本符号、一般符号、符号要素和限定符号等组成。 (1)基本符号:基本符号只用以说明电路的某些特征,而并不表示独立的( )或元件。 (2)一般符号:是用于表示一类或此类产品特征的一种通常很简单的符号。 (3)符号要素:一种具有确定意义的( ),必须同其...
【单选题】( )汁又叫天生白虎汤?
A.
冬瓜
B.
南瓜
C.
西瓜
D.
黄瓜
E.
苦瓜
【简答题】一个完整的图表通常由 _______ 、 _______ 、 _______ 和 _______ 等几大部分组成。
【单选题】To review and assess achievements and summarize and exchange experience______the task of our present Congress.
A.
are
B.
is
C.
were
D.
have been
【单选题】Which of the following statements is NOT correct?When the War of Independence was over, ___.
A.
each new state had its own government.
B.
each new state made its own laws and handled all of its internal affairs.
C.
the national government was called the Congress with little power.
D.
the relationships between the states and the national government were clearly defined.
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