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举一反三
【单选题】Passage Three Teaching children to read well from the start is the most important task of elementary schools. But relying on educators to approach this task correctly can be a great mist...
A.
only logical and natural
B.
the expected position
C.
probably a mistake
D.
merely effective instruction
【多选题】环境声学的研究内容包括
A.
声音的产生、传播和接收
B.
声音对人体产生的生理、心理效应;
C.
改善和控制声环境质量的技术和管理措施;
D.
与振动有关的理论与控制技术。