— Many kinds of animals are in danger now.
一 That's true. And the government is making laws to protect them.
A:keep……clean
B:keep……safe
C:make……die
Mr. Smith arrived at the station______.
在测量小灯泡的电功率的实验中,把标有“2.5V”的灯泡L与滑动变阻器R串联起来接在电压是5V的电源上,调节滑动变阻器,使灯泡正常发光,测得小灯泡的功率为0.5W,以下说法中不正确的是( )
①光合作用②细胞呼吸③消化吸收④主动运输.