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【判断题】
IPSec即Internet协议安全性，是一种开放标准的框架结构，通过使用加密的安全服务以确保在Internet协议IP网络上进行保密而安全的通讯。()A.
正确
B.
错误
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举一反三
【单选题】I’ll come after the meeting if time ________.
A.
allows
B.
needs
C.
requires
D.
permits
【单选题】We expect to finish painting by Friday, if time pressing, the bosun can arrange ________work for the sailors
A.
over time
B.
over the time
C.
extra time
D.
overtime
【单选题】__________, we'll come to see you again. A. If time will permit B. Time permits C. Time permitting D. Time permitted
A.
If time will permit
B.
Time permits
C.
Time permitting
D.
Time permitted
【单选题】The university wants its undergraduates to __ a regional language, if time permits.
A.
take up
B.
take after
C.
take on
D.
take over
【单选题】—What are you going to do this weekend? . If time permits, I may go to Shanghai with my friends.
A.
Don’t mention it
B.
It doesn’t matter
C.
Forget it
D.
It depends
【单选题】__________, we'll come to see you again.
A.
If time will permit
B.
Time permits
C.
Time permitting
D.
Time permitted
【简答题】伯努利方程中p/ρg表示1N的流体在某截面处具有的静压能,又称为 。
【单选题】I’ll come after the meeting if time ______.
A.
permits
B.
is permitting
C.
is permitted
D.
has permitted
【单选题】, I'll go and visit you when I am on business in Beijing?. [ ]
A.
If time permitted
B.
Time permits
C.
Time permitted
D.
Time permitting
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