皮皮学，免费搜题
登录
搜题
【单选题】
教学用发电机能够产生正弦式交变电流.利用该发电机(内阻可忽略)通过理想变压器向定值电阻R供电,电路如图所示,理想交流电流表A、理想交流电压表V的读数分别为I、U,R消耗的功率为P.若发电机线圈的转速变为原来的1/2,则( )A.
R消耗的功率变为（1/2）P
B.
电压表V的读数为（1/2）U
C.
电流表A的读数变为2I
D.
通过R的交变电流频率不变
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Up to now, the programme ________ thousands of children who would otherwise have died. [ ]
A.
would save
B.
saves
C.
had saved
D.
has saved
【简答题】Some people think that those who have received higher education should be paid a higher salary than those who have not because the former have paid more for their education. Write an essay of about 40...
【简答题】从事危险作业的职工必须办理意外伤害保险,该保险费应由( )支付。A. 职工本人 B. 职工本人与施工企业共同 C. 施工企业 D. 劳动部门 B. 职工本人与施工企业共同 C. 施工企业 D. 劳动部门
【简答题】生态旅游用的帐篷一般分为______和_______
【简答题】数据分析生命周期模型的六个阶段是:探索发现、____ 、____、____ 、沟通结果、____。
【单选题】99 A line manager who is asked to wear two hats and function as a project manager at the same time is likely to exercise:
A.
Authority
B.
Power
C.
Influence
D.
All of the above
E.
A and B only
【简答题】按照连架杆中是否有(),可以将铰链四杆机构分为()、()、()。
【多选题】影响股票发行价格的因素总体上说有发行人自身的因素和环境因素,其中,发行人自身的因素有( )
A.
发行人核心业务发展前景
B.
管理费用和经济规模性
C.
发行人所处行业的发展概况
D.
投资项目的赢利预期
【单选题】17 A line manager who is asked to wear two hats and function as a project manager at the same time is likely to exercise:
A.
Authority
B.
Power
C.
Influence
D.
All of the above]
E.
A and B only
相关题目：