下载APP
举一反三
【单选题】Most shoppers know the feeling. You stand in front of piles of organic produce and wonder what those premium prices are buying you over and above what you get from standard foods. Not a lot nutrition-...
A.
do not use naturally produced fertilisers
B.
produce carbon dioxide when removing weeds
C.
use high doses of weed-killer
D.
use too many resources to qualify for organic status
【单选题】Most shoppers know the feeling. You stand in front of piles of organic produce and wonder what those premium prices are buying you over and above what you get from standard foods. Not a lot nutrition-...
A.
they are approved by many experts
B.
C. they won’t cause diseases
C.
B. they taste better than standard foods
D.
they are free from pesticides
相关题目：
【单选题】Most shoppers know the feeling. You stand in front of piles of organic produce and wonder what those premium prices are buying you over and above what you get from standard foods. Not a lot nutrition-...
A.
do not use naturally produced fertilisers
B.
produce carbon dioxide when removing weeds
C.
use high doses of weed-killer
D.
use too many resources to qualify for organic status
【判断题】在锅炉的顶部，有一个锅炉燃油加热器，要经常检查锅炉燃油加热器的使用情况。
A.
正确
B.
错误
【单选题】管加热器的作用是（）。
A.
消除多余的双氧水
B.
高温杀菌
C.
加热产品进行消毒
D.
保证正压
【多选题】滤油设备如采用油加热器时，应();停机时操作顺序相反。
A.
先投加热器
B.
后开启油泵
C.
先开启油泵
D.
后投加热器
【单选题】Most shoppers know the feeling. You stand in front of piles of organic produce and wonder what those premium prices are buying you over and above what you get from standard foods. Not a lot nutrition-...
A.
they are approved by many experts
B.
C. they won’t cause diseases
C.
B. they taste better than standard foods
D.
they are free from pesticides
【多选题】⾼压加热器分为()
A.
混合式
B.
表⾯式
C.
对流式
D.
逆流式
【单选题】NCC320柜配有（）个230VAC，250W的加热器。
A.
1；
B.
2；
C.
3；
D.
4
【单选题】更换APU燃油加热器时（）
A.
需拆下APU发动机
B.
可以不拆下APU发动机
C.
只需拆下APU发电机
D.
只需拆下APU引气活门
【单选题】APU滑油加热器系统（）工作。
A.
飞机在空中飞行时
B.
至少有一台发动机工作时
C.
当APUC有电源时
D.
当地面服务汇流条有电源时
【单选题】当燃油加热器发生火灾时，（）.
A.
可以用消防水枪立即把它扑灭
B.
不可以用消防水枪立即把它扑灭
C.
可以用泡沫灭火器来扑救
D.
可以用水剂灭火器扑救
【判断题】传热油系统油加热器壳程走传热油，管程走蒸汽。
A.
正确
B.
错误
【单选题】传热油系统油加热器为（）换热器。
A.
列管式
B.
浮头式
C.
翅片管式
D.
板式
【单选题】当滑油温度低于多少时滑油加热器开始工作:（ ）
A.
15.6℃；
B.
25℃;
C.
20℃。
【单选题】当滑油温度低于多少时滑油加热器开始工作（）
A.
15.6℃；
B.
25℃；
C.
20℃
【判断题】在油温满足开车条件的情况下，启动冰机前不必启动油加热器。
A.
正确
B.
错误