咽喉与脏腑的关系中，中医认为咽为______，喉为______。
参考答案：胃之系 肺之系
工人未遵守操作规程导致产品出现了次品、废品这属于( )。
A．偶然性原因
B．不可避免原因
C．正常原因
D．系统性原因
Researchers at Children’s Hospital of Pittsburgh announced they had discovered ______ evidence that a virus is involved in what used to be called juvenile diabetes.
A. incessant B. compelling C. identical D. problematic
