【单选题】在有腐蚀性的环境中工作时,应选用( )钢丝绳
【单选题】Ulrich suspected somebody had intruded into the woodland because
A.
some animals made some unusual movement.
B.
he was informed of the intrusion in advance.
C.
his foresters detected the trace of the intruder.
D.
there was suffocating quietness in the air.
【单选题】在有腐蚀性的环境中工作时应选用()钢丝绳
【单选题】在有腐蚀性的环境中工作时应选用()钢丝绳。
【判断题】在有腐蚀性的环境中工作时应选用镀锌钢丝。
【单选题】在有腐蚀性的环境中工作时应选用()钢丝绳。