are still a must on certain occasions
are bound to return sooner or later
are still being taught by parents at home
can help improve personal relationships
第1题：
An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, ‘df‘ still shows the filesystem as 100% full.What is the likely cause of the problem and what will resolve it?（）
A.The deleted file is still open by the application.The system must be rebooted before‘df‘ will show the reduction in the filesystem.
B.The deleted file is still open by the application.The application must be stoppedbefore ‘df‘ will show the reduction in the filesystem.
C.The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before ‘df‘ will show the reduction in the filesystem.
D.The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before ‘df‘ will show the reduction in the filesystem.
第2题：
The velocity of the apparent wind can be more than the true wind，and come from the same direction，if certain conditions are present．One condition is that the ______．
A.Ship's speed must be less than the true wind velocity
B.True wind must be from dead astern
C.True wind velocity must be faster than the ship's speed
D.True wind must be from dead ahead
第3题：
The purpose of the author in writing this passage is
A． that, by banning the violent sports, we human beings can improve ourselves
B． that, by banning the dangerous sports, we can improve the law
C． that we must take positive steps to improve social welfare system
D． to show law is the main instrument of social change
第4题：
第5题：
第6题：
A. The neighbor‘s advertised distance must be less than or equal to the feasible distance of the current successor.
B. The neighbor‘s advertised distance must be less than the f easible distance of the current successor.
C. The neighbor‘s advertised distance must be greater than the feasible distance of the current successor.
D. The neighbor‘s advertised distance must be equal to the feasible distance of the current successor .
E. The neighbor‘s advertised distance must be greater than or equal to the feasible distance of the current successor.
第7题：
Heavy fuel oils when spilled are ______.
A.more harmful to sea life than lighter oils
B.easier to clean up than lighter refined oils
C.less harmful to sea life than lighter oils
D.not a real threat to marine life
第8题：
A Paying online is much unsafe than before ;
B Paying online is less safer than before ;
C Paying online is much safer than before
第9题：
第10题：