武士债券是日本发行的外国债券。( )
参考答案：错
解析： 武士债券是非日本发行人在日本债券市场上发行的以日元为面值的债券。
“与”门电路的逻辑功能表达式为Q=A+B+C。
You could hear water pipes cracking _____ they _____ because of the cold. [ ]
A. when; burst
B. before; were burst
C. when; were burst
D. before; burst
