问题 多项选择题

对装置有电流表的汽车,当发动机怠速时电流表指示不充电的原因有()。

A.发电机电刷脏污

B.风扇皮带太松

C.起动机接线松动

D.转速过低

E.电流表损坏

答案

参考答案:A, B, E

单项选择题 A1/A2型题
多选题

红水河,为西江上游的别称,流域内山岭连绵,地形崎岖,水力资源十分丰富,它的梯级开发已被我国列为国家重点开发项目。读“珠江流域概况图”,回答问题.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

小题1:红水河水电梯级开发对珠江三角洲地区的影响主要有

A.满足用电需求的增长

B.加剧珠江三角洲的洪涝灾害

C.改善大气环境质量

D.不易出现淤积减慢或侵蚀后退小题2:下列符合红水河流域综合开发利用方向的是:

A.微电子工业

B.有色金属冶炼工业

C.发展木材加工和制药工业

D.发展甜菜、花卉等城郊农业