【单选题】If a DC motor runs hot, the cause may be _____.
B.
low ambient temperature
C.
clogged ventilation ducts
D.
an open in the shunt field
【单选题】Bin Laden was killed _____ May 2, 2011. [ ]
【单选题】当前中国交易额最大的第三方支付平台是()。
【单选题】Dear editor, Why do newspapers have so many advertisements for electronic (电子的) equipment? Last Sunday I counted ads. for seven kinds of televisions and thirteen kinds of radios in the Youth Journal. ...
B.
a shop that sells electronic equipment
D.
a hotel where the writer stayed
【单选题】支付宝已成为中国最大的第三方支付平台,也是全球最大的()厂商。
【单选题】In the past few years the school has ______ a lot of money improving the teaching equipment.
【单选题】If a DC motor runs hot, the cause may be ____.
B.
an open in the shunt field
C.
clogged ventilation ducts
D.
low ambient temperature
【单选题】(2011·浙江)Experts think that ________ recently discovered painting may be ________ Picasso.