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【单选题】
“风”指“十五国风”,共有( )篇,多是经过润色后的民间歌谣。A.
100
B.
150
C.
160
D.
165
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举一反三
【单选题】What is the direct labor efficiency variance?
A.
$2,352 F
B.
$2,352 U
C.
$4,320 F
D.
$4,320 U
【单选题】What is said to be the best way to conserve energy nowadays？
A.
Raising efficiency.
B.
Cutting unnecessary costs.
C.
Finding alternative resources.
D.
Sacrificing some personal comforts.
【单选题】A 240-V DC motor(直流马达) draws 6A and develops an output power of 1.6hp. (1 hp=746 W) (a) What is its efficiency? (b) How much the power is wasted?
A.
(a) 82.9% (b) 189 W
B.
(a) 84.9% (b) 246 W
C.
(a) 82.9% (b) 246 W
D.
(a)72.9% (b) 226 W
【单选题】What is the approximate efficiency of a hydroelectricity scheme?
A.
100%
B.
90%
C.
50%
D.
33%
【单选题】According to the passage, what is the purpose of training?
A.
To improve employee efficiency
B.
To spend excess capital
C.
To satisfy government requirements
D.
To please a supervisor
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