皮皮学，免费搜题
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【单选题】
已知一平面余弦波的波动方程为【图片】, 式中 x 、y均以cm计．则在同一波线上, 离x = 5 cm最近、且与 x = 5 cm处振动相位相反的点的坐标为A.
7.5cm
B.
55cm
C.
105cm
D.
205cm
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】___ apples and milk on sale in this Downtown Supermarket.
A.
3
B.
There are
C.
There is
D.
There isn't
【单选题】_apples and milk on sale in this supermarket.
A.
There are
B.
There is
C.
There isnot
【单选题】I put some apples and milk in the cup and ____ when I make fruit salad.
A.
mix them up
B.
add them up
C.
cut them up
D.
put them up
【单选题】—Do you know the girl __is talking to our English teacher? —Yes. She’s my sister.
A.
who
B.
whom
C.
which
D.
Whose
【简答题】500°C以下的中低温通常可以采用( )来测量。
【单选题】To our__________, the little girl is the first to go to bed.
A.
surprises
B.
surprise
C.
surprised
D.
surprising
【单选题】apples and milk on sale in this Downtown Supermarket.
A.
There are
B.
There is
C.
There isn't
【单选题】_____apples and milk on sale in this shop
A.
3
B.
There are
C.
There is
D.
There isn't
【单选题】To our great surprise, the blind girl learned to _______ music so well just by ear. [ ]
A.
give
B.
take
C.
carry
D.
play
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