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【单选题】
某学生学习钢琴弹奏技能，在练习一段时间之后发现自己的成绩总是提高不明显，其原因可能是由( )现象导致的。A.
定势
B.
功能固着
C.
适应
D.
高原
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皮皮学刷刷变学霸
举一反三
【简答题】来源于一个细胞在固体平板培养基上形成的群体称()。
【单选题】下列关于货币时间价值的说法，正确的是：
A.
研究货币的时间价值要考虑风险和通货膨胀
B.
研究货币的时间价值要考虑风险和通货膨胀
C.
企业在研究投资项目时，可以不考虑社会平均利润率
D.
是评价投资方案的标准之一
【单选题】Producing a thermogram is ______.
A.
expensive because of the high voltage the machine requires
B.
a time-consuming process
C.
inexpensive after the machine is purchased
D.
an unsafe procedure
【判断题】The only difference between machine learning and artificial intelligence machine is that machine learning requires sufficient data for making it function.
A.
正确
B.
错误
【单选题】The machine requires _____, so the workers are required _____ ready.
A.
repair；to get
B.
repairing；to get
C.
repairing；getting
D.
to be repaired；getting
【简答题】The machine requires ________________(fix).
【单选题】On January 1, Year 1, an entity acquires a new machine with an estimated useful life of 20 years for $100,000. The machine has an electrical motor that must be replaced every five years at an estimate...
A.
$5,000
B.
$5,500
C.
$8,000
D.
$10,000
【简答题】Installing this machine requires the ______ (coordinate) of many people.
【单选题】There is something wrong with the machine. It requires________.
A.
examine
B.
examined
C.
to examine
D.
examing
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