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【简答题】
读图及文字资料，回答下面2题。 材料一：山东半岛的烟台、威海地区每年冬季都有大雪降临。特别是进入12月份以来，我国遭到持续冷空气的袭击。在烟台，短短20多天下了三场强降雪，出现了50年来罕见的雪情。 材料二：近年来，山东已成为我国北方地区重要的蔬菜生产基地之一。 15．下列关于烟台、威海两地，每年冬季 都有大雪降临的说法，正确的是 A．受来自太平洋东南暖湿气流的影响 B．纬度较高，常年受中纬西风的影响 C．与日本本州岛西部冬季多暴雪成因相同 D．靠近冬季风源地，冬季气温异常偏低 小题1:大棚中生产出来的蔬菜质量略逊于自 然状态下生长的蔬菜，原因是大棚中 A．光照太强 B．热量不足 C．日温差较小 D．年温差较大
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【多选题】有一交流电 ,加在电感L为100mH的电感线圈两端,下面叙述正确的是
A.
流过电感的电流的初相位是零度。
B.
流过电感的电流最大值是12.1A
C.
感抗XL是31.4Ω。
D.
流过电感的电流瞬时值表达式为
【判断题】True or false.Someday sloppy people will put everything in order, getting round to doing everything they've included on their agenda,
A.
正确
B.
错误
【简答题】若正弦电压u=220 sin100πtV加在电感勾L=0.0127H的线圈上，试求电感元件的无功功率。
【简答题】线性电感元件是指电感量L为______的电感。
【判断题】Someday sloppy people will put everything in order, getting round to doing everything they’ve included on their agenda.
A.
正确
B.
错误
【单选题】Read the text of UNIT 2 Neat People vs. Sloppy People, what's the writer's purpose of writing this passage?
A.
Compare the differences between neat people and sloppy people
B.
Discuss the causes of difference between neat people and sloppy people
C.
To disprove the conventional attitudes toward neat people and sloppy people
D.
Criticize neat people for their insensitivity.
【单选题】Which of the following is the author's attitude towards a sloppy and indulgent culture?
A.
He is in favor of it.
B.
His view is balanced.
C.
He is slightly critical of it.
D.
He is strongly critical of it.
【简答题】某电感线圈，两端电压为 ，电流为 ，试求该线圈电阻R和电感L。
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