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【多选题】
下列关于税减免优惠政策的表述中,正确的有( )。A.
经批准临时入境的外国，不征收税
B.
插电式混合动力汽车按照同类车辆适用税额减半征税
C.
按照规定缴纳船舶吨税的机动驳船，自《税法》实施之日起3年内免征税
D.
燃料电池汽车免征车船税
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【单选题】The well was found _______ when we got there. [ ]
A.
digging
B.
to be dug
C.
to dig
D.
being dug
【单选题】When drinking from the well, one mustn't forget ______ who dug it.
A.
this
B.
these
C.
that
D.
those
【单选题】下列关于线粒体DNA的独特特点,说法不正确的是:
A.
线粒体遗传病表型不常见，说明突变的mtDNA基因不是很普遍。
B.
线粒体基因组能够单独进行复制、转录及合成蛋白质。
C.
线粒体遗传系统仍需依赖于细胞核遗传系统。
D.
对mtDNA多态性的研究主要集中于mtDNA的非编码区（D-loop）和部分编码区。
【单选题】Forty miners were buried in the coal mine and they had to _____. [ ]
A.
be dug into
B.
be dug out
C.
dig for
D.
dig up
【单选题】One third of the people trapped in the ruins _______ at last.
A.
has dug out
B.
was dug out
C.
have dug out
D.
were dug out
【单选题】Eighty percent of the people trapped in the ruins ____ at last. [ ]
A.
was dug out
B.
has dug out
C.
were dug out
D.
have dug out
【单选题】He was buried in the ruins and had to _____. [ ]
A.
be dug in
B.
be dug out
C.
dig out
D.
dig in
【简答题】The t_________ dug out of the earth was a box of gold coins.(财宝)
【单选题】下列关于线粒体DNA的独特性,说法正确的是:
A.
mtDNA以最少的基因编码足够多的蛋白质、RNA和脂类
B.
mtDNA的多肽链都是线粒体能量产生途径氧化磷酸化的亚单位
C.
mtDNA的除母系遗传方式之外其他与核基因组没有明显差异
D.
mtDNA的复制方式与核基因组类似
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