The word tracks in Paragraph 9 is closest in meaning to______.
A. ways
B. music
C. fields
D. trace
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According to the professor, what is the basic philosophical foundation of the nation?
A. John Locke"s three concepts.
B. Voltaire"s first Amendment.
C. Montesquieu"s Constitution.
D. Machiavelli and Hobbe.
患者,女性,22岁,心悸、手抖、怕热、 烦躁5个月,查体:轻度突眼,甲状腺l度肿大,心率130次/分,手指细震颤(): T3、T4高于正常,TSH降低。该患者首选的治疗是
A. 抗甲状腺药物
B. 手术切除部分甲状腺
C. 放射性核素治疗
D. 切除甲状旁腺
E. 抗甲状腺药物治疗稳定后放射性碘治疗
双极性权电阻网络DAC如图所示,图中模拟开关在Di=0时,接向地线;Di=1时,接向-8V。试填写输入D和输出电压Vo的真值表并说明该双极性DAC是正参考还是负参考?若要改变参考极性,电路应作哪些变化?
What can be inferred based on the description of the comets center as a potato?
A. The comet has holes and bulbs like a potato.
B. The surface of the comet is too smooth to resemble a potato.
C. The comet is as smooth as people expected.
D. Some parts of the comet haven"t been smoothed.