给漫画中的小主人公出个招，让他摆脱烦恼[ ] ①提高学习效率，科学安排时间 ②给

衡量网络上数据传输速率的单位是bps，其含义是 ( )

A．信号每秒传输多少公里

B．信号每秒传输多少千公里

C．每秒传送多少个二进制位

D．每秒传送多少个数据

The picture shows what Liu Fei does on Sundays. He spends 9.6 hours sleeping and ______ hours

doing sports a day.

[ ]

A. 3

B. 6

C. 7

A．The man doesn’ t like any of the two coats.

B．The man doesn’ t care which coat he is going to buy.

C．The man likes a different coat.

D．The man wants to choose a coat himself.

复合性溃疡常在何时出现（）。

A.胃溃疡先于十二指肠溃疡

B.十二指肠溃疡先于胃溃疡

C.十二指肠溃疡与胃溃疡同时

D.十二指肠溃疡愈合后

E.十二指肠溃疡合并胃炎后才出现胃溃疡

哪些原因引起部件热不稳定？