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【简答题】
函数y=-2x 2 +x有最______值，最值为______．
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皮皮学刷刷变学霸
举一反三
【判断题】实验调查法是指市场实验者有目的、有意识地通过改进或控制一个或几个市场影响因素的实践活动，来观察市场现象在这些因素的影响下的变动情况，认识市场现象的本质和发展变化规律。()
A.
正确
B.
错误
【单选题】( )是指市场调查者有目的有意识的改变一个或几个影响因素,来观察市场现象在这些因素影响下的变动情况,以认识市场现象的本质特征和发展规律。
A.
观察法
B.
实验法
C.
访问法
D.
文案调查法
【简答题】Jennifer couldn't keep ______ her tears when she saw the sick children at a new blood cancer center in Virginia.
【简答题】Jennifer couldn't ______ her tears when she saw the sick children at a new blood cancer center in Virginia.(made it; with open arms; strip off; keep back; free of; After all; straighten up; throw awa...
【单选题】Jennifer couldn't ________ her tears when she saw the sick children at a new blood cancer center in Virginia.
A.
keep back
B.
keep out
C.
keep away
D.
keep up
【单选题】男,50岁,下肢静脉曲张7年。行大隐静脉剥脱术后,护士鼓励患肢早期活动的目的是预防( )
A.
.肌肉僵直
B.
患肢水肿
C.
血管痉挛
D.
术后复发
E.
深静脉血栓形成
【单选题】Jennifer couldn't ______ her tears when she saw the sick children at a new blood cancer center in Virginia.
A.
get rid of
B.
turn into
C.
keep back
D.
give out
【简答题】Fill in the blanks with the expressions given below. Change the form where necessary. Each expression can be used only once. make it; with open arms; strip off keep back; free of/from; after all; ...
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