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【判断题】
各种自动化设备,如数控机床、自助加油站中没有计算机。A.
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B.
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【单选题】Bats are able to maneuver in the dark even if they are blindfolded. However, if their ears are taped shut they cannot find their way. Bats emit very high pitched sound waves through their nostrils. Th...
A.
Bats are able to maneuver in the dark even if they are blindfolded.
B.
However, if their ears are taped shut they cannot find their way.
C.
Bats emit very high pitched sound waves through their nostrils.
D.
The reflection of these sound waves reaching their sensitive ears enables bats to avoid obstacles.
E.
In this way they can capture even very tiny insects.
F.
Many bats prefer to eat fruit than insects.
【简答题】（13分）组成生命细胞的11种常量元素（约占人体总质量的99.97%），全部位于周期表的前20号。其中组成人体蛋白质、脂肪、碳水化合物和核酸的主要有6种元素。 （1）这六种元素中除H、C、O、P、S外，应该还有____（写元素符号），它的基态原子核外电子排布式是 ，其第一电离能比O的________(填“大”或“小”)；与它同周期，且单质熔点最高的元素在周期表中的位置...
【简答题】请以“知与行”为主题发表一个演讲。
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