不亲和性
参考答案：指细胞中一种质粒会影响另一种质粒的存在，往往只含有其中一种质粒。
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Lewis searched for his ID card for a whole day last Sunday, but it ____ in his pocket the next day.
A．turned up
B．turned over
C．turned on
D．turn out
国际漫游来访实施超短话单原则，即小于等于（）秒的话单免收通话费。
