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III. Mark each statement true (T) or false (F). (2 points for each, 12 points in all.) 1. It is common for an American to marry a person from a different ethnic background.________ 2. Americans usually base their marriage decisions upon practical considerations. ________ 3. The interracial marriages between blacks and whites continue to be rare in the U.S. ________ 4. In the U.S, many parents arrange marriages for their children. ________ 5. It is customary for the bride to wear a wedding veil, which can prevent other people from seeing the bride’s face. _______ 6. After the wedding, the bride usually throws the bouquet to the women guests. ________
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【单选题】We make sure we’re always well stocked up with candles, just ________.
A.
in case
B.
for certain
C.
in practice
D.
for use
【单选题】在下图所示结构中,杆 a 的轴力(以拉力为正)为( )。
A.
-3P
B.
2P
C.
3P
D.
4P
【单选题】光纤是一种能够传输光频电磁波的介质波导,其结构上由( )组成
A.
纤芯、包层和护套
B.
单模和多模
C.
阶跃和梯度光纤
D.
塑料、晶体和硅
【单选题】下面关于算法的说法错误的是()。
A.
算法最终必须由计算机程序实现
B.
为解决某问题的算法同为该问题编写的程序含义是相同的
C.
算法的可行性是指指令不能有二义性
D.
以上几个都是错误的
【简答题】请简述一下如何选购打印机。
【简答题】在《中国美术小史》中,作者认为从()开始中国的绘画发生了病变。
【单选题】光纤是一种能够传输光频电磁波的介质波导,其结构上由( )组成
A.
纤芯、包层和护套
B.
单模和多模
C.
塑料、晶体和硅
D.
阶跃和梯度光纤
【简答题】简述一下如何选购打印机
【单选题】It's quite a time _____ Liu Xiang was injured in the foot, but we're sure it won't be long _____ he returns to the track. [     ]
A.
after; when
B.
before; since
C.
that; when
D.
since; before
【简答题】请简述一下如何选购打印机。
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