According to the passage, the two students failed in their study because of their______.
A. shyness
B. proudness
C. self-doubt
D. laziness
查看答案
A．onB．forC．asD．to
A. on
B. for
C. as
D. to
The last sentence of the passage implies that______.
A. the seasonal pattern has an impact on food values
B. the seasonal pattern determines a person's life expectancy
C. the seasonal pattern still influences life expectancy even if nutrition improves at all times of the year
D. the seasonal pattern will not change even if nutrition has improved much in modern age
每块以太网卡都有一个全球唯一的MAC地址，MAC地址由6个字节组成。（）
在数据通信和计算机网络中，二进制信息是一位一位串行传输的，因此传输速率的度量单位是每秒多少比特。（）
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