1. [单选题]锅炉停用时间超过一个月，应该()。
A. 停火留汽
B. 停炉加入碱度合适的水并保持较高水温
C. 采用满水保养法
D. 用干燥保养法
2. [单选题]Overheating of the hydraulic fluid in an electro-hydraulic anchor windlass can result from a/an( ).
A. overload on the pump motor
B. low fluid level in the reservoir
C. low fluid viscosity around the shaft seal
D. high oil level in the sump
3. [单选题]活塞的裂纹可采用_______检查
A. 超声波探伤
B. 听响法
C. 着色探伤
D. 磁粉探伤
4. [单选题]He often teaches ________ to speak English
A. we
B. us
C. our
D. ours
5. [单选题]心肺复苏有效指征()Ⅰ.皮肤黏膜由紫绀变红润Ⅱ.颈动脉有无变有Ⅲ.瞳孔由大变正常
A. Ⅰ
B. ⅠⅡ
C. ⅠⅡⅢ
D. ⅠⅡⅢⅣ
