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【单选题】
当船舶静置于坦时,水中相比,浮力将发生变化,而不能处于平衡,为了得到平衡, 。A.
船中在波谷时．船舶将下沉ξ值；船中在波峰时，船舶要上升 ξ 值
B.
船中在波谷时，船舶将上升 ξ 值；船中在波峰时，船舶要下沉 ξ 值
C.
船中在波谷时，船舶将下沉 ξ 值；船中在波峰时，船舶也下沉 ξ 值
D.
船中在波谷时，船舶将上升 ξ 值；船中在波峰时，船舶也上升 ξ 值
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举一反三
【单选题】(听力对应练习）How often does Tracy goes to the movies?
A.
twice a week
B.
once a week
C.
Not very often
【单选题】Tracy often listen to music in her spare time.中listen to music的中文意思是:
A.
听收音机
B.
听音乐
C.
打篮球
D.
/
【多选题】Listen and choose Tracy’s expressions.
A.
How may I help you?
B.
What can I do for you?
C.
Hold the line, please.
D.
Can you hold for a moment?
E.
Would you like to leave a message?
F.
Anything I can do for you?
【单选题】--- What do you often do_______ classes to relax yourselves? --- We often do eye exercises, listen to music or do some running around the school.
A.
in
B.
among
C.
between
D.
during
【单选题】—Don't you often listen to _____ rad io? —No. In fact, I haven't _____ radio . [ ]
A.
a ; an
B.
/ ; the
C.
an; /
D.
the; a
【单选题】The music ________ nice. I often ___________ it.
A.
listen to / sound
B.
hears / listen to
C.
listens to / listen to
D.
sounds / listen to
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