皮皮学，免费搜题
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【单选题】
()一般用于还原身体重心或脚距,调节击球的姿势。A.
垫步
B.
交叉步
C.
D.
跨步
拍照语音搜题，微信中搜索"皮皮学"使用
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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】如题26初始单纯形表中,各个变量对应的检验数为:
A.
5-9M，-2+4M，-4+7M，M，0，-M，0
B.
-5，4M，-4+7M，0，0，-M，0
C.
5M，-2+4M，-4，0，M，4，0
D.
-5+9M，-2+4M，-4+7M，-M，0，-M，0
【单选题】如题26:初始单纯形表中,各个变量对应的检验数为
A.
0，1，M，0，-2，-M，0
B.
M，1，2-2M，-M，0，0，0
C.
-M，1，2+2M，0，0，-M，0
D.
M，1，2-2M，0，0，-M，0
【单选题】Suppose country A had been traditionally enjoying a comparative advantage in the production of good X. As a result most of the large firms manufacturing and exporting good X were concentrated in count...
A.
The number of firms to begin operation in country B must be greater than the number of firms operating in country
B.
The consumers in country B should have a relatively elastic demand compared to the consumers in country
C.
The newfirms in country B should have a higher input-output ratio than the firms operating in country A
D.
The output level of the new firms in country B should be large enough to enable them to enjoy scale economies.
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