【多选题】下列各命题, 其中正确命题的选项是 __________ . ( 写出所有正确命题的选项 ) :
【简答题】以下关于计算机病毒的特征说法正确的是A. 计算机病毒只具有破坏性,没有其他特征 B. 计算机病毒具有破坏性,不具有传染性 C. 破坏性和传染性是计算机病毒的两大主要特征 D. 计算机病毒只具有传染性,不具有破坏性
【判断题】 Most people want to know how things are made. They frankly admit, however, that they feel completely at sea when it comes to understanding how a piece of music is made. Where a composer begins, how ...
【单选题】节约法计算过程中,当计算出两两客户之间的可节约距离后,下一步应该做的是
【简答题】 Section B. Complete the sentences with exactly the expressions in the box. (20%) expand your horizons, free from, in time to, deal with, shut up, lose his temper, by himself, give a good reason ...
【简答题】 请选择一个单词或词组填入下列句子中 account identification passport check withdraw driver’s license deposit interest minimum transfer Sarah went to the ATM to ...
【单选题】下列选项中正确的是 [ ]
A.
命题p: ,tanx 0 =1;命题q: ,x 2 -x+1>0,则命题 是真命题
B.
集合M={x|x 2 <4},N={x|x 2 -2x-3<0},则M∩N={x|-2<x<3}
C.
命题“若x 2 -3x+2=0,则x=1”的逆否命题为“若x≠1,则x 2 -3x+2≠0”
D.
函数f(x)=x 2 +2(m-2)x+4在[1,+∞)上为增函数,则m的取值范围是m<1
【简答题】“Get your hands off me, I have been stolen,” the laptop, a portable computer, shouted. That is a new solution to laptop computer theft: a program that lets owners give their property a voice when it h...
【单选题】下列选项中,说法正确的是
B.
命题“ 为真”是命题“ 为真”的充分不必要条件