单项选择题

有价值的创业机会的基本特征不包括：（） A. 有吸引力 B. 普遍性 C. 持久性 D. 及时性

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轴的定位基准选择，粗基准一般选择外圆表面。
正确
错误

答案：正确

多项选择题

A Trojan Horse was __________.
A、a trophy of the Greeks from the Trojan War.
B、a huge, hollow wooden horse in which Greek soldiers concealed themselves in order to enter Troy.
C、a trap intended to bring about the downfall of an enemy or opponent.
D、a computer program planted illegally to do damage locally.