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【判断题】
加热速度越快，奥氏体晶粒越粗大。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】w______ n. 证人;目击者; vt. 目击;证明;作证
【简答题】n. 目击者,证人 v. 目睹,目击 w_
【单选题】How long can a fire water pool provides if fire occurs?
A.
10 min
B.
15 min
C.
20 min
D.
30 min
【单选题】If a fire occurs in the boiler room as a result of a leaking fuel line, you should FIRST _____.
A.
notify the engineer on watch
B.
isolate and secure the piping
C.
throw sand on the fire
D.
extinguish the fire using a combination nozzle with applicator
【单选题】If a fire occurs in the boiler room because of a leaking fuel line to a burner, you shut off the fuel using the .
A.
burner valve
B.
root valve
C.
quick closing valve
D.
oil return valve
【单选题】How long can a fire water tank provides if fire occurs?
A.
10 min
B.
15 min
C.
20 min
D.
30 min
【简答题】When fire occurs, being calm is especially _ because panic worsens emergency.
【单选题】If a fire occurs in the boiler room as a result of a leaking fuel line, you should first ______
A.
notify the engineer on watch
B.
isolate and secure the piping
C.
throw sand on the fire
D.
extinguish the fire using a combination nozzle with applicator
【简答题】目击者 n. w________
相关题目：
【单选题】How long can a fire water pool provides if fire occurs?
A.
10 min
B.
15 min
C.
20 min
D.
30 min
【单选题】How long can a fire water tank provides if fire occurs?
A.
10 min
B.
15 min
C.
20 min
D.
30 min