人体脏腑组织的统一性，主要是通过经络系统的联系作用来实现的。
参考答案：对
单词拼写。
1. Beg p_____, I didn't quite catch your meaning.
2. Disco music usually has strong b_____ to it.
3. She went upstairs to f_____ some newspapers.
4. Mr. Zhang _____ (举起) his hat and smiled at us.
5. How beautiful your bedroom _____ (天花板) is!
The idea of fish being able to produce electricity strong enough to light a lamp is almost unbelievable, _____ several kinds of fish are really able to do this.
A．therefore
B．and
C．then
D．but
