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【多选题】
全球四大成熟的卫星导航系统是()
A.
中国北斗卫星导航系统
B.
日本准天顶卫星系统
C.
美国全球定位系统
D.
俄罗斯格洛纳斯卫星导航系统
E.
欧洲卫星导航系统
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参考答案:
举一反三
【单选题】What is the boy good at?
A.
Playing football
B.
Playing tennis
C.
Playing baseball
D.
Playing basketball.
【单选题】The boy is good at playing _____ guitar and _____ table tennis.
A.
the, /
B.
/, a
C.
a, /
D.
/, the
【单选题】The bright boy is good at maths.
A.
明亮的
B.
可爱的
C.
聪明的
【单选题】The boy is good at English. He often helps me __________ Chinese ___________English.
A.
translate; in
B.
to translate; from
C.
translate; from
D.
translate; into
【单选题】如下格式的声音文件中,( )的音质较好。
A.
WAV
B.
MIDI
C.
CD-DA
D.
MP3
【简答题】某教学楼的内廊为简支在砖墙上的现浇混凝土板,计算跨度为L=2.66m,永久荷载标准值为q=3.405KN/m,可变荷载标准值为q=2.5KN/m,构件的安全等级为二级,试计算该楼板的弯矩设计值。
【单选题】The boy is good at _________ football.
A.
play
B.
to play
C.
played
D.
playing
【单选题】The tall boy is good at______ basketball. [     ]
A.
plays
B.
to play
C.
play
D.
playing
【单选题】The little boy is good at drawing .
A.
is poor at
B.
is slow at
C.
does well in
【简答题】下图中,KT是( )延时型时间继电器;
参考解析:
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