不属于个人可支配收入的是( )。 A．所得税 B．赠与税 C．契税 D．不动产

下列有关电学知识的叙述正确的是(　　)．

A．电功率越大的用电器消耗的电能越多

B．对人体的安全电压是不高于36 V

C．白炽灯发光时，实际功率越大的灯泡越亮

D．家庭电路中电流过大的原因可能是用电器的总功率过大

This company was the first ___________ portable radios as well as cassette tape recorders in the world.[ ]

A. producing

B. to produce

C. having produced

D. produced

如图所示，请将螺丝口灯泡和开关连接起来，并且接入家庭电路中．

When the old man ______ to walk back to his house, the sun       itself behind the

mountain. 

A．started; had already hidden

B．had started ;had already hidden

C．had started; was hiding

D．was starting; hid

社会主义公民道德建设以（）为着力点

A、爱祖国、爱人民、爱劳动、爱科学、爱社会主义

B、为人民服务

C、社会公德、职业道德、家庭美德

D、集体主义