A、Number of feeding Trichinella spiralis cysts
B、Viability of the spiralis cysts
C、Location of larvae parasitism
D、Host immunity to Trichinella spiralis
A、It's pure luck that works in such a crisis.
B、It's mental strength that works in such a crisis.
C、It's friendship that works in such a crisis.
D、It's government power that works in such a crisis.
A、The author gives some suggestions to graduates about their dreams B. The passage tells us what should do and what shouldn’t do. C. We should never say die. D. You should know what your dreams are.
B、The passage tells us what should do and what shouldn’t do.
C、We should never say die.
D、You should know what your dreams are.
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