【简答题】编写应用程序,使用for循环语句计算8+88+888...前10项之和。
【简答题】设 ,问A为何值,可使(1)R(A)=1;(2)R(A)= 2;(3)R(A)=3.
【单选题】设m∈R,向量a=(1,m).若|a|=2,则m等于( )
【简答题】根据合同法,以下叙述错误的是【 】 A.定金是合同担保的一种方式 B.定金不得超过主合同标的额的20% C.当事人既约定违约金又有定金的,可以同时适用 D.发生违约时,定金或者加倍返还,或者无权要求返还
【单选题】What bothers David about his neighbor's son?
A.
His neighbor's son plays his piano too loudly.
B.
His neighbor's son's car is too noisy.
C.
His neighbor's son turns on the music till midnight.
【简答题】设集合A={1,2,3},A上的关系R={(1,2),(1,3)},则r(R)=______,s(R)=______,t(R)=______.
【单选题】What can we learn from the conversation?
A.
The mother lives with her son.
B.
The mother's son has died.
C.
The mother is always waiting for his son's letters.
【单选题】What’s your ________ name ? [ ]