专四51.___he always tries his best to complete it on time.51.___he always tries his best to complete it on time.A.However the task is hard B.However hard the task is?C.Though hard the task is D.Though hard is the task 为什么D 不可以选呢?不

专四51.___he always tries his best to complete it on time.51.___he always tries his best to complete it on time.A.However the task is hard B.However hard the task is?C.Though hard the task is D.Though hard is the task 为什么D 不可以选呢?不 TR He didn't understand much,___he always thought he understood everything.A.but B.so C.and D.or Busy ___he is,he always finds time for sports.A.as B.although为什么although在这里不对呢? 四阶魔方的第一个公式u2 TR U' TR' 莪弄四阶魔方 看公式 和看天书一样的 麻烦啊 TR是什么意思 tr是什么意思 四阶矩阵A的特征值分别为1,2,-1,3,求A^2-A+E和tr(A*) 用适当的关系代词或关系副词填空.英语高手进,1.say all ___you know2.this is the time at ___he usually arrives3.i sing the same song ___he always sings 4.these are such men ___we believe5.i forgot to tell you the time ___i shall retur tr-100 ,tr-150 ,tr-200 有什么不同? He's never interested in maths ,___he?___,so his father is always angry.选项如下：A is,YesB has ,YesC is,NoD has,No请解答并翻译. ___he have a computer?填空 ___he have a red nose? 四阶魔方棱合并 最后两棱合并不了公式用的是 TR U' R U TR’反复转 总是有两个喝不到一起给个解决的公式 tr tr dr dr怎样读 always always always