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【单选题】
下列关于发酵工程的说法,错误的是A.
发酵工程产品主要是指微生物的代谢产物、酶和菌体本身
B.
可以通过人工诱变选育新菌株
C.
培养基、发酵设备和菌种必须经过严格的灭菌
D.
环境条件的变化既影响菌种的生长繁殖又影响菌体代谢产物的形成
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【单选题】The mention of the extinction of the US auto industry is used to show
A.
Extinction is very important to all the human beings
B.
All the species lived in the past have died off today
C.
Evolution will inevitably cause species to disappear
D.
The loss of a few species among millions affects nothing
【单选题】The US auto (汽车) industry, a symbol of the American spirit, narrowly escaped a sudden breakdown, _____ China has become the world’s top automaker.
A.
when
B.
while
C.
but
D.
although
【简答题】How would the auto industry most likely be affected by the business cycle? The industry is most likely toLaura James is the head portfolio manager for National Fund, a U.S. based mutual fund with a we...
【单选题】The decline in the auto motive industry began with the oil crisis of 1973—1994, when gasoline prices rose over 300 percent. Almost immediately, consumers began switching to smaller, more fuel-efficien...
A.
In the early 1970s.
B.
In the late 1970s.
C.
From1973 to 1994.
D.
In 1994.
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