综合布线系统水平缆线与建筑物主干缆线及建筑群主干缆线之和所构成信道的总长度不应大于() m。
参考答案:2000
读短文,在正确的句子前的括号里写“T”,错误的写“F”。
Hello! I am Tom. In the morning, I get up at six o'clock. I wash my face and brush my teeth. Then
I eat breakfast with my family at six thirty. At six forty I go to school by bicycle. I am never late, but Lily
is sometimes late and Mary is always late. They always run to school.
( ) 1. Tom gets up at seven o'clock in the morning.
( ) 2. Tom doesn't brush his teeth.
( ) 3. Tom is never late for school.
( ) 4. Tom goes to school on foot.
( ) 5. Mary is always late.
为保障资金安全,持卡人可到银行办理()服务,以便持卡人及时了解账户余额变动情况。
A、短信提醒
B、自动还款
C、短信认证
D、自动语音