电传打字机
参考答案：
用打字的方式直接拍发和接收电文的电报机。
Some people prefer to work and live in Chengdu, for the price of an apartment is less than half of ________ of big cities like Beijing, Shanghai, and Guangzhou.
A．it
B．what
C．that
D．One
给外单位拉运低温液体的槽车充灌低温液体时，有哪些注意事项？
