位置运算符()的作用在于此运算符两侧的检索词必须出现在同一字段中。 A: N(Near) B: W(With) C: F(Field) D: S(Sub-field/Sentence)

Sociolinguistics is the sub-field of linguistics that studies the relation between ___________ and ___________, between the ________ and ________ of language and the ________ structures.

The type of field generated by a DC tacho-generator is A: pulsating magnetic field B: static field C: rotating field D: do not need field

What can be said about the field A: The field is left unplanted. B: The field is lying waste. C: The field is left open to playing. D: The field is played with this year,

The curl equation [img=154x44]1803a2a153c85f5.png[/img]shows that : A: The time-varying magnetic field can generate an electric field, in which the elecric field lines is closed around the magnetic field line. B: The time-varying magnetic field can generate a magneitc field, in which the magnetic field lines is closed around the electric field line. C: The magnetic field lines is closed themselves. D: Flux continuity

Which is not the sub-field of human geography A: tourism geography B: geopolitics C: industrial economics D: cultural geography

Which of the following schools of thoughts is NOT a sub-field within ethics? A: dandyism B: deontology C: virtue ethics D: utilitarianism

场论可以分为classic field theory和quantum field theory

There is no magnetic field in an ideal conductor, but there is a magnetic field inside because of the surface current。

The Biot-Savart Law is used to（ ） A: determine the magnetic field created by an electric current B: determine the electric field created by an electric current C: determine the force field created by an electric current D: determine the magnetic field created by individual point charges E: determine the electric field created by individual point charges