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【单选题】
______ that the demand for power continues to rise at the current rate, it will not he long before tradi-tional sources become inadequate.A.
Concerning
B.
Ascertaining
C.
Assuming
D.
Regarding
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举一反三
【单选题】In 1720,Bach’s wife suddenly died, ______him with four children．
A.
leaving
B.
to leave
C.
left
D.
had left
【简答题】基准物质必须具备的条件 、组成恒定 、 、摩尔质量大。
【单选题】Which of the following italicized parts indicates a result?
A.
Her husband died, leaving her a lot of money.
B.
Hearing the news, he jumped to his feet.
C.
The blind man stood there begging for a meal.
D.
He sat by the window, thinking of the problem.
【单选题】下列哪种不是实验室暴露的常见原因( )
A.
因个人防护缺陷而吸入致病因子或感染性生物因子的气溶胶
B.
被污染的注射器或实验器皿、玻璃制品等锐器刺伤、扎伤和割伤
C.
生物安全柜内加样、移液等操作时发生的感染性材料溢洒
D.
离心感染性材料过程中发生离心管破裂导致致病因子外溢和实验人员暴露
【单选题】Unfortunately, his father died, ______ the family even worse off.
A.
left
B.
to leave
C.
leaves
D.
leaving
【单选题】The brave man died,________ his young wife nothing but a________ cottage.
A.
left; breaking
B.
leaving; broken
C.
left; broken
D.
to leave; breaking
【单选题】The brave man died, his young wife with a cottage.
A.
left; breaking
B.
leaving; broken
C.
left; broken
D.
to leave; breaking
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