钾盐是在卤水蒸发晚期沉积的。瓦利亚什科提出()假说来解释钾盐矿床的形成。
A.沙洲说;
B.沙漠说;
C.萨布哈说;
D.干盐湖说
参考答案:D
I feel it hard to keep up with my classmates in study and sometimes I lose heart. But whenever I want to ,
my teacher always encourages me to work harder. [ ]
A. go on
B. run away
C. give up
D. look out
FTP的作用可以完成文件传输,将远程计算机的文件拷贝到自己的计算机上被称为______。