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【单选题】
Vertigo is an electronics company. According to the BCG matrix, which of the following products of Vertigo would most likely classify as a question mark?A.
Blue–a cell phone that is designed for music lovers and has a very low market share in a market that is growing steadily
B.
Electra–a home entertainment system that has a strong market share in a market that is likely to expand in the future
C.
Jump–an MP3 player that has a high market share in a market that is not expected to grow significantly
D.
SpinDrive–a car audio system that has a high market share in a market that has been growing constantly
E.
SoLo–a CD player that has a very low market share in a market that is shrinking rapidly
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【单选题】关于电导率仪的使用,下面哪一点叙述不正确( )
A.
把“温度”钮置于25℃刻度线时，测定值是溶液在测量温度下的电导率值
B.
需要调节“常数校正”，使仪器显示出电导池系数的数值
C.
可用滤纸擦拭电导电极的铂黑
D.
测量结束后电导电极应用蒸馏水冲洗干净
【简答题】There is nothing new about people cutting down trees. In ancient times, Greece, Italy, and Great Britain were covered with forests. Over the centuries those forests were gradually cut back, until now ...
【单选题】关于电导率仪的使用,下面哪一点叙述不正确
A.
把“温度”钮置于25℃刻度线时，测定值是溶液在测量温度下的电导率值
B.
需要调节“常数校正”，使仪器显示出电导池系数的数值
C.
可用滤纸擦拭铂黑电极
D.
测量结束后电导电极应用蒸馏水冲洗干净
【多选题】关于胸膜转移瘤的说法下列哪些是正确的（）
A.
是其他部位的肿瘤沿血行或淋巴途径到达胸膜所致
B.
常见的原发肿瘤包括骨肉瘤、恶性神经鞘瘤和脑胶质瘤等
C.
主要病理变化是胸膜散在多发的转移性结节，多伴血性胸水
D.
CT表现为胸膜散在结节或不规则状增厚，可伴纵隔淋巴结肿大
E.
CT或MRI增强检查胸膜上结节影无明显强化
【简答题】钳工划线的主要作用有哪些?
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