【单选题】关于放置输入出埠(Place Port)的叙述,何者有误?
C.
选取输出入埠后,按空格键,该输出入埠将逆时针旋转90度
D.
输出入埠I/O Type只有Input和Output
【判断题】造成我国水污染的原因有:工业污染、农业污染和生活污染。
【单选题】近来,常有3条腿,五条腿的畸形蛙出现的报道,出现这些畸形蛙的原因最可能是
【单选题】A full moon was shining down on the jungle. Accompanied only by an Indian guide, the American explorer and archaeologist Edward Herbert Thompson -- thirteen hundred years after the Mayas had left thei...
A.
had been abandoned by the Mayas about thirteen hundred years previously
B.
had been occupied and developed by the Mayas about thirteen hundred years before
C.
had been deserted by the Mayas as soon as the Spaniards arrived
D.
was conquered by the Mayas thirteen hundred years ago
【简答题】造成贮水池(箱)中的水被污染的原因有很多,下述哪一条不会造成贮水池(箱)中的水被污染?( )