I ____ at home to look after my sick mother
A.can’t help stay
B.can’t help staying
C.cannot help but stay
D.cannot help but staying
A.can’t help stay
B.can’t help staying
C.cannot help but stay
D.cannot help but staying
第2题
A.I am afraid I must go. --()
B. Take it easy
C. Go slowly
D. Stay longer
E. See you
第3题
Where is my pen? I ______ it.
A. might lose
B. would have lost
C. should have lost
D. must have lost
第4题
Did you see who the driver was?
— No, the car ran so fast ____ I could not have a good look at his face.
A.that
B.which
C.as
D.after
第5题
某质点对于某定点O的动量矩矢量表达式为Lo=6t2i+(8t3+5)j-(t-7)k,式中,t为时间,i、j、k为沿固定直角坐标轴的单位矢量。求此质点上作用力对点O的力矩。
第6题
A.Sàng lọc
B.Săn sóc
C.Sạch sẽ
第7题
对于任意的b∈{1,…,p-1},有唯一的i∈{1,…,p-1},使得(),称i为模p下以a为底b的离散对数,记为:i≡logab(mod p)。
第8题
第9题
下面这个程序段的时间复杂度是()。 for (i=1;i<n;i++) { y=y+1; for (j=0;j<=(2*n);j++) x++; }
A.O(log2n)
B.O(n)
C.O(nlog2n)
D.O(n2)
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