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【多选题】
6硬盘的内部结构主要包括硬盘控制电路和A.
B.
读/写磁头组件
C.
磁头驱动机构
D.
主轴组件
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】插销1,插销2的零件图创建
【简答题】插销的零件图创建
【单选题】Suppose the U.S. dollar substantially depreciates against the Japanese yen. The change in exchange rate?
A.
can have significant economic consequences for U.S. firms.
B.
can have significant economic consequences for Japanese firms.
C.
can have significant economic consequences for both U.S. and Japanese firms.
D.
none of the above
【单选题】Suppose the U.S. offered a tax credit for firms that built new factories in the U.S. Then
A.
the demand for loanable funds would shift rightward, initially creating a surplus of loanable funds at the original interest rate.
B.
the demand for loanable funds would shift rightward, initially creating a shortage of loanable funds at the original interest rate.
C.
the supply of loanable funds would shift rightward, initially creating a surplus of loanable funds at the original interest rate.
D.
the supply of loanable funds would shift rightward, initially creating a shortage of loanable funds at the original interest rate.
【简答题】红外分光光度计的光源主要有 和 。
【单选题】模拟小实验：（如图准备装置）在两只烧瓶里分别充满CO2和空气，塞紧带有温度计和胶头滴管的橡皮塞。再把两只烧瓶放在红外线下照射，观察温度升高的情况。结论：两瓶在相同光线照射下，装CO2的温度较邻瓶高，最大可达4℃。据此完成下列各题。 大气中二氧化碳增多的主要原因是（） ①大量燃烧矿物能源 ②火山喷发 ③过度发展核电 ④过度砍伐森林
A.
①②
B.
①③
C.
②③
D.
①④
【简答题】请对试验结果进行简要分析
【简答题】羰基(>C=O),碳-碳双键(>C=C 打浆和加填均能增加纸页的白度。 在纸页内光的散射越厉害,透过纸页的光量就越少,纸的不透明度就越大。
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