股份有限公司召开董事会时，董事必须亲自出席，因故不能出席的，视同弃权处理。 ()
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【B13】
A. must
B. should
C. would
D. might
According to the passage, the cold of winter ______.
A. improves the ability to think
B. is the best time for thinking
C. is better for thinking than is very warm weather
D. incerases the ability to think
隧道、人防工程、高温、有导电灰尘或灯具离地面高度低于2.5m等建筑施工现场照明采用电压等级不大于()。
A. 36V
B. 24V
C. 42V
D. 12V
The first two sentences in the second paragraph tell us that ______.
A. products can satisfy the consumers by mechanized producers
B. consumers can express their demands through producers
C. producers decide the price of products
D. supply and demand regulate prices
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