Question

True or False:


13. The real image cannot be obtained on the screen. ( )


14. The electric bell works on the electromagnet. ( )


15. The basic unit of the time is second. ( )


16. The decaying leaves and animal droppings in a forest enrich the soil. ( )


17. Waste water released by houses is called sludge. ( )

Answer 1

Answer:

13.True14.False15.True16.True17.False

Answer 2

13 . False
14. True
15. True
16. True
17. False

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