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【简答题】
当两个比较方案的年产量不同时,若Pa>Pc,则()的方案较优。
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反馈参考答案：
举一反三
【单选题】设A= a x + a -x 2 ，B= a x - a -x 2 ，C= B A ，a＞0，则下列三个结论中正确的个数是（ ） （1）A 2 -B 2 =1 （2）A -2 -C 2 =1 （3）C -2 -B -2 =1．
A.
3
B.
2
C.
1
D.
0
【简答题】The traditional Chinese lunar calendar divides the into 24 solar terms( 节气 ).Awakening of Insects falls on March 6 and ends on March 20 this year. Awakening of Insects 1 a rise in temperature and incr...
【简答题】改正下列句子中的搭配错误。只需要写出错误的地方,并进行改正,不需要写整句。 1 I could hear a slight track of an Irish accent in her voice. 2 Paolo was met with a rocky silence as everyone tried to absorb the bad news. 3 The old woman let ...
【简答题】I. Fill in the blanks with proper prepositions. 1. He was indifferent _______ his personal appearance even in formal situations. 2. Something is wrong _______ her eyesight. 3. Students should not be t...
【简答题】Alex saw some________(mouse) running across the floor. 2. We have four ________(class) this morning. 3. Accurate ______(datum) covering the fact are not obtainable. 4. Thunder and lightning are _____...
【单选题】下列三个结论中正确结论的个数是 (1)函数f(x)= 的定义域是(1,2) (2,3); (2)若
A.
3
B.
2
C.
1
D.
0
【单选题】下列三个结论中正确结论的个数是( ) (1)单位向量都相等; (2)若向量 与 是共线向量,则A、B、C、D四点共线; (3)在平面中若向量 ∥ , ∥ ,则 ∥ .
A.
3
B.
2
C.
1
D.
0
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