不定项选择

‌由555定时器构成的单稳态触发器，其暂态时间等于1.1倍RC，其中R是电阻值，C是电容值。‍

A．错误
B．正确

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单项选择题

Many pop stars do crazy gimmicks to try and stay famous. How do pop stars react to the public being “unshockable”?

A．.they give up their crazy gimmicks
B．.they try more and more crazy or interesting things to try and stay famous
C．.they just focus on their music, and ignore the fact that they’re famous
D．.they think the most important thing is making money, not being famous

深圳坚持解放思想、与时俱进,率先进行市场取向的经济体制改革,首创1000多项改革举措,奏响了实干兴邦的时代强音,实现了由到的历史性跨越。

答案： (1) 经济体制改革 ...