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【单选题】
从n个元素中取出m个元素的所有排列的个数,称为从n个不同元素中取出m个元素的( )A.
排列数
B.
组合数
C.
队列数
D.
小组数
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反馈参考答案：
举一反三
【单选题】Choose the INFORMAL sentence from the three sentences.
A.
We need to check the data before we continue.
B.
We need to chech everything before we carry on.
C.
We need to verify the data before we proceed.
【简答题】He was （flipping/checking through）a magazine in the living room. (Choose the informal word from the given ones, and fill in the blank.)
【单选题】Choose the most informal word to complete the following sentence."The government will ___to reduce unemployment by supporting new businesses."
A.
attempt
B.
try
C.
endeavor
D.
strive
【简答题】下列端口定义语句正确有()。A. input a ; B. input a,b; C. input [3:0] a,b; D. input a b c;
【单选题】Choose the word that means the same as the underlined one. The drastic lockdown brought the nation’s economy to a stagnation and left millions of workers in the informal sector, who live hand-to-mouth...
A.
predilection
B.
standstill
C.
thrall
D.
rendition
【简答题】With Google search engine, are people getting______(foolish/dumb)? (Choose the informal word from the given ones, and fill in the blank.)
【单选题】Choose the most informal word to complete the following sentence."The researchers ____the most modern equipment. "
A.
utilise
B.
employ
C.
operate
D.
use
【简答题】()是防止和减少交通事故的最有效手段。
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