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【简答题】
环境容量的特征包括客观存在性、不确定性、 、跨学科性。
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】超声场作用像一个光学的 “ 相位光栅 ” ,其光栅常数等于( )。
【单选题】Which book is _______, the blue one , the red one or the black one? [ ]
A.
interesting
B.
more interesting
C.
the most interesting
D.
more interested
【单选题】Which T-shirt is more expensive?
A.
The black one is more expensive than the yellow one.
B.
The yellow one is more expensive than the original one.
C.
The black one is more expensive than the original one.
D.
They are in the same price.