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【单选题】
关于外毒素的叙述,下列哪错误的A.
是活菌释放至菌体外的一种蛋白质
B.
主要由革兰阳性菌产生,少数革兰阴性菌也能产生
C.
性质稳定,耐热
D.
毒性强,引起特殊病变
E.
抗原性强
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反馈参考答案：
举一反三
【单选题】______, some people think there is something in them.
A.
His ideas may sound crazy
B.
As his ideas may sound crazy
C.
Crazy as his ideas may sound
D.
As crazy his ideas may sound
【单选题】The playwright was known not for his original ideas but for his ______ of ideas that had been propounded by others.
A.
invention
B.
reiteration
C.
consideration
D.
rejection
【简答题】1-m sure that he'll change his ideas．（改为同义句） He______ ______ ______ ______his ideas，
【简答题】实践的基本特征包括()
【单选题】He traveled to the Northern part of the country, ______ he got many new ideas for this book.
A.
which
B.
there
C.
where
D.
that
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