皮皮学，免费搜题
登录
搜题
【单选题】
正常运行情况下,电动机、一般工作场所的照明和无特殊规定的用电设备端子处,电压偏差允许值(以额定电压的百分数表示)为()。A.
±10%
B.
±5%
C.
±7%
D.
正、负偏差绝对值之和不超过10%
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】What is true about delivery?
A.
We should be really dramatic in a speech
B.
Delivery can help get the attention of your audiences
C.
Delivery simply means keeping your voice loud
D.
There is a standard delivery for all speeches
【简答题】拆卸蓄电池正、负极柱头时,应先拆()极端头,再拆()极柱头;安装蓄电池正、负极柱头时,应先装()极柱头,再装()极柱头。
【单选题】The sentence 'But this has rarely been a one-way street' in the last paragraph means that ______.
A.
contemporary art has been nourished by modern science
B.
modern science has been nourished by art
C.
artists can become scientists and scientists can become artists
D.
the impacts of modern art and science are actually mutual
相关题目：