【单选题】Which picture shows conserving resources?
【单选题】He ordered that the medicine by a special plane. A.was sent B.would be sent C.should send D.be sent
【判断题】电磁继电器是利用电磁铁来控制工作电路的一种开关。
【单选题】mask Please choose the right Chinese meaning.
【单选题】Which picture shows reusing something?
【单选题】Which picture shows water pollution?
A.
empty bottles thrown in a river