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【单选题】
对病毒体特征的叙述错误的是A.
以复制方式增殖
B.
测量单位是μm
C.
只含一种核酸
D.
是专性细胞内寄生物
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【单选题】The machine will continue to make much noise ___ we have it repaired.
A.
when
B.
bacause
C.
if
D.
unless
【单选题】The machine will continue to make much noise ______we have it repaired.
A.
when
B.
because
C.
if
D.
unless
【简答题】2 Complete the sentences. ► Make sure ____ you keep your receipt. 1 We were very ____ with the slow service,
and in the end we ____ about it. 2 You often get a two-year ____ with a new
w...
【单选题】Volts from the Sky Lightning has caused awe and wonder since old times. Although Benjamin Franklin demonstrated lightning as an enormous electrical discharge more than 200 years ago, many puzzles stil...
A.
Cloud-to-ground lightening occurring in the US
B.
Types of lightening
C.
Cause of lightening
D.
Differences between thunder and thunderstorm
E.
Frequencies of thunderstorms occurring in the world and the US Paragraphs 2 and 3 ______.
【简答题】In earliest times, men considered lightning to be one of the great mysteries (神秘的事物) of nature. Some ancient peoples believed that lightning and thunder were the weapons (武器) of the gods. In reality, ...
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