单项选择题

茄科的雌蕊通常是
A、2心皮、子房上位、侧膜胎座
B、2心皮、子房上位、中轴胎座
C、2心皮、子房下位、侧膜胎座
D、2心皮、子房下位、中轴胎座

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单项选择题

(7分55秒-8分9秒）When Bill Gates says “...But we need to get going, because time is not on our side. ” He actually means that_______.

A．We might feel panic in the face of pandemics
B．We might have to hoard cans of spaghetti or go down into the basement.
C．Investing more money in pandemics should be a priority.
D．What money can’t buy is time, so we need to respond to pandemics as early as possible.

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提高感性负载的功率因数的方法为： A.
给它并联一个电容 B.
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