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【单选题】
以下哪种变异属于细菌基因型的改变( )A.
沙门菌鞭毛变异
B.
在溶菌酶的作用下,细菌形成L型细菌
C.
人工传代后有荚膜的肺炎链球菌荚膜丢失
D.
的转移而使细菌获得新的耐药性
E.
光滑型的沙门菌经人工培养后变成粗糙型
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【单选题】The scariest thing about me is that I get mad easily.
A.
the scariest thing
B.
about me
C.
that I get mad easily
【单选题】I couldn't (work out) why anyone would invent something so boring.
A.
draw up
B.
bring out
C.
put forward
D.
figure out
【单选题】I couldn’t work out why anyone would invent something so boring.
A.
draw up
B.
bring about
C.
put forward
D.
figure out
【单选题】Why would anyone believe that they would let the economy __________ into a hard landing?
A.
crash
B.
excite
C.
affact
D.
notice
【简答题】Some people say, “Extreme(极限的) sports are so erous. Why would anyone want to do them?” But the er is what makes them so excited. Keep reading to find out the most popular ones. Bungee jumping:...
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