单选题The length of time active immunity lasts varies with different diseases,Achanges withBalternates withCkeeps up withDgets along with
单选题
The length of time active immunity lasts varies with different diseases,
A
changes with
B
alternates with
C
keeps up with
D
gets along with
参考解析
解析：
句意：主动免疫持续时间的长短随不同的疾病而不同。change with根据……而变化。alternate with与……交替，与……交换。keep up with跟上，跟随，跟踪（潮流）。get along with与……相处融洽。
句意：主动免疫持续时间的长短随不同的疾病而不同。change with根据……而变化。alternate with与……交替，与……交换。keep up with跟上，跟随，跟踪（潮流）。get along with与……相处融洽。
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