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【单选题】
以下不属于音频格式的是()
A.
WMA
B.
MP3
C.
WAV
D.
AMR
E.
WMV
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参考答案:
举一反三
【单选题】Every possible means_____ been tried,and we find only______ this means can we do it well.
A.
have,in
B.
have,by
C.
has,in
D.
has,by
【简答题】在平面直角坐标系中,矩形纸片ABCD的长为4,宽为2.AB,AD边分别在x轴、y轴的正半轴上,点A与坐标原点重合.将矩形纸片沿直线折叠,使点A落在边CD上,记为点A',如图所示. (1)设A'的坐标是(2a,2)(0≤a≤2),写出折痕所在直线的方程; (2)若折痕经过B时,求折痕所在直线的斜率,并写出以折痕为直径的圆方程.
【单选题】We have to ______ everything question in detail ______ we take action. [     ]
A.
conclude; before
B.
make analysis of; when
C.
expose; until
D.
analyze; before
【单选题】— We haven't  done very well ,have we ? — At least we tried . [      ]
A.
Why not ?
B.
By all means .
C.
Not exactly.
D.
Never mind.
【单选题】下列药材在采收加工时进行“发汗”的是
A.
雷丸
B.
茯苓
C.
猪苓
D.
五倍子
【单选题】We judge others around us easily, but have we ever tried to figure out our own personality?
A.
used to
B.
agree to
C.
want to
D.
tend to
【单选题】下列药材在采收加工时进行“发汗”的是( )
A.
冬虫夏草
B.
茯苓
C.
猪苓
D.
灵芝
E.
松萝
【单选题】下列药材在采收加工时进行“发汗”的是()
A.
昆布
B.
冬虫夏草
C.
猪苓
D.
灵芝
E.
茯苓
【单选题】____ we have tried it, we can't imagine how hard it is. [     ]
A.
Unless
B.
Because
C.
Although
D.
When
【单选题】下列药材在采收加工时进行“发汗”的是 ( )
A.
冬虫夏草
B.
茯苓
C.
猪苓
D.
灵芝
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