仪表管道安装时一般根据现场的实际情况决定其走向，应避免高热、易损坏、易腐蚀及不便检修地方，但潮湿、振动场合不受限制。( )
参考答案：错
—______ you ever ______ to the United States?
—No, never, but I went to Canada a few years ago [ ]
A. Have….been
B. Have…gone
C. Did…go
2361+736+237的值是 ( )
A．3572
B．3201
C．3334
D．3021
