树德中学高2025级高一上期期末测试(2月)语文试题

树德中学高2025级高一上期期末测试(2月)语文试题于2026-02-03发布，目前已经汇总了树德中学高2025级高一上期期末测试(2月)语文试题的各科答案和试卷，更多试卷答案请关注本网站。

本文从以下几个角度介绍。

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树德中学高2025级高一上期期末测试(2月)数学试题

树德中学高2025级高一上期期末测试(2月)生物试题

By allowing filtering based on specific needs.
By providing free training for volunteer skills.
By recommending overseas opportunities first.
By focusing only on long-term volunteer projects.
B
The best and most-commonly used sources for the pills we have are oily fish like salmon(鲑鱼),mackerel(鲭鱼) and sardine(沙丁鱼). Many environmentalists fear that some species are being overfished for this purpose. We may have an endless voracity for fish oil, but we don't have an endless supply of fish.
Menhaden(鲱鱼), which is described as “a big-headed, smelly, foot-long fish”, is in great danger. Although prized for dinner in the 18th century, the species has become the unknown victim of the fish oil business, which presents us with potential selfish. Menhaden feeds almost entirely on algae(海藻)and is especially good at changing it into omega-3 fatty acids, which make it a good target for fish oil companies.

4、树德中学高2025级高一上期期末测试(2月)生物试题

6、树德中学高2025级高一上期期末测试(2月)生物学试题

4、树德中学高2025级高一上期期末测试(2月)历史试题

3、树德中学高2025级高一上期期末测试(2月)生物学试题

4、树德中学高2025级高一上期期末测试(2月)生物试题

（2）定值电阻R2的阻值。
分析：（1）由图可知，当开关S1、S2均闭合时，R2被短接，电路等效为R1接在电源两极的简单电路，电流表测量电路中的电流；由欧姆定律计算电源电压；
（2）当只闭合开关S1闭合时，R1、R2串联，电流表测量电路中的电流，根据串联电路规律和欧姆定律计算定值电阻R2的阻值。
解析：解：（1）由图可知，当开关S1、S2均闭合时，R2被短接，电路等效为R1接在电源两极的简单电路，电流表测量电路中的电流I=0.5A，
由欧姆定律可得，U=U1=IR1=0.5A×10Ω=5V；
（2）当只闭合开关S1闭合时，R1、R2串联，电流表测量电路中的电流I′=0.1A，
根据欧姆定律可得，R1两端的电压：U′1=I′1R1=I′R1=0.1A×10Ω=1V，

树德中学高2025级高一上期期末测试(2月)化学答案