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【单选题】
两台同型号同容量的同步发电机并联运行时,功率分配均匀,系统无自动调频调载装置。两台柴油机调速器的调差率不同,当电网功率增加后,两机的输出功率都有增加,结果是调差率小的输出功率与调差率大的输出功率相比为 。A.
调差率小的输出功率大
B.
调差率大的输出功率大
C.
两者相等
D.
视当时负载情况而定
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皮皮学刷刷变学霸
举一反三
【单选题】You must remember _____. [ ]
A.
what your father said
B.
what did your father say
C.
your father said what
【单选题】You must remember . [ ]
A.
what your father said
B.
what did your father say
C.
your father said what
D.
what do you father say
【简答题】英汉互译。 1. 去滑冰 ____________________ 2. 看猴子 ____________________ 3. row a boat ____________________ 4. 去滑雪 ____________________
【单选题】________ you row a boat at the age of 10? No, but now I ________.
A.
Can；can
B.
Can；could
C.
Could ；can
D.
Could；could
【单选题】When the row boat entered the tunnel, what did Mr. Wonka urge(催促) the Oompa-Loompas to do?
A.
Row slower
B.
Row faster
C.
Sing louder
D.
Turn around
【单选题】— ? — He is tall and strong.A．What does your father likeB．What is your father likeC．What would y
A.
— ____? — He is tall and strong. A．What does your father like
B.
What is your father like
C.
What would your father like
D.
How does your father like
【简答题】完成教材P111的T16。并增加一问:若采用调速方式,试确定转速应调为多少。
【单选题】—Ming _____ row a boat when he was ten. —And he still _____ now. [ ]
A.
can’t; can’t
B.
could; couldn’t
C.
couldn’t; can’t
D.
couldn’t; couldn’t
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