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【简答题】
在双缝干涉实验中,波长λ=550nm的单色平行光垂直入射到间距 的双缝上,屏到双缝的距离D=2m, 用一折射率为n=1.50的玻璃片覆盖一条缝后,零级明纹移到原来的第5级明纹处,求玻璃片的厚度。
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举一反三
【单选题】慢性肾炎的治疗措施不包括（）
A.
常规应用激素及细胞毒药物
B.
积极控制血压
C.
避免用氨基糖苷类抗生素
D.
应用血小板解聚药
E.
肾功能不全氮质血症时限制食物中蛋白和磷
【简答题】Compare and contrast the two invasions, in terms of (1) the cause, (2) the initial resistance strategy, (3) severe weather, as well as (4) the fate of invaders and their leader. Evaluation criteria : ...
【简答题】reuse directly pollute step severe shortage compare amount replace effect 1. In our company, a large of money is spent on advertisements every...
【简答题】Questions 1 through 3 are based on the following news. 1. A. To inform parents and schools B. To pick out good students C. To compare teachers D. To expose poor schools. 2. A. They have no trust in do...
【单选题】下列各项，慢性肾炎治疗措施不包括的是（）
A.
优质低蛋白、低磷饮食
B.
积极控制血压
C.
抗凝、抗血小板聚集
D.
糖皮质激素和细胞毒药物
E.
避免有损肾功能的因素
【单选题】Please compare the following three sentences and point out the stylistic effect of “(3) No spitting”. (1) Expectoration is forbidden. (2) Please do not spit! (3) No spitting.
A.
formal
B.
colloquial
C.
concise and conspicuous (obvious)
D.
slangy
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