皮皮学,免费搜题
登录
搜题
【单选题】
电力网络的不变损耗是指()。
A.
系统中变压器的空载损耗
B.
系统中线路的损耗
C.
变压器的铜耗
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】Thirteen and eighteen is _____________. [     ]
A.
thirty-one
B.
thirty one
C.
five
【简答题】A.About four thirty. B.About five thirty. C.About three thirty. D.About three,
【简答题】影响反应速率的因素主要有 、 、 、 四种。
【简答题】影响化学反应速率的因素主要有 、 和 。
【判断题】不可比产品不属于商品产品
A.
正确
B.
错误
【单选题】I have ___________ pencil-cases. [     ]
A.
thirty one
B.
thirty five
C.
thirty-five
【单选题】Twenty-one plus sixteen equals . [     ]
A.
 thirty-six
B.
 thirty-eight
C.
 thirty-seven
【单选题】I usually exercise __________.
A.
about at ten thirty 
B.
at about ten thirty
C.
at ten thirty about
【单选题】He played golf _____. [     ]
A.
about thirty years
B.
for thirty years
C.
thirty years before
D.
for long time
【单选题】There are _____ boys in my class. [     ]
A.
thirty two
B.
thirty and two
C.
thirty-two
D.
thirty-and-two