《矿山安全法》明确规定:提升装置必须有声光兼备的信号装置,除有信号装置外,还必须有直通电话。
参考答案:对
Read and choose. 补全对话。
Saleswoman: Can I help you?
Bill: 1
Saleswoman: What colour do you like?
Bill: 2
Saleswoman: How about this pair?
Bill: 3 How much are they?
Saleswoman: 20 yuan.
Bill: 4 Bye-bye!
Saleswoman: 5
A. Bye-bye!
B. It's a black bag.
C. Great!
D. How are you?
E. I want to buy a pair of shoes.
F. Here is the money
G. Red.
关于外存储器,正确的有()。
A.硬盘、软盘、光盘存储器都要通过接口电路接入主机
B.CDROM是一种可重写型光盘,目前已成为多媒体微机的重要组成部分
C.软盘和光盘都便于携带,但光盘的存储容量更大
D.硬盘虽然不如软盘存储容量大,但存取速度更快