_________可以获取ArrayList对象x中的第一个元素。 A: x.first() B: x.get(0) C: x.get(1) D: x.get()

Which of the following transition signals is not used for describing causes? A: The first cause of (Y) is (X) B: (Y) is due to (X) C: Owing to (X), (Y) D: The first effect of (X) is (Y)

数组q[M]存储一个循环队，first和last分别是首尾指针。如果使元素x出队操作的语句为“first=(first+1)%m, x=q[first];”。那么元素x进队的语句是_____。? q[(last+1)%m]=x;|x=q[last], last =(last+1)%m;|q[last+1]=x;|last=(last+1)%m,q[last]=x;

It took Malcolm X a day to copy the first page of the dictionary.

Suppose the demand and supply curves for good X are both linear. And, the demand price for the first unit of X is $28, and the supply price for the first unit of X is $6. If the equilibrium price for good X is $16 and the equilibrium quantity of X is 24,000 units, then total consumer surplus is $________, total producer surplus is $_________, and total social surplus is $_____________. A: $144,000; $120,000; $264,000 B: $672,000; $144,000; $384,000 C: $120,000; $144,000; $264,000 D: $28; $6; $16 E: $144,000; $672,000; $384,000

下列代码中if (x 〉0){System.out.printIn("first");}else if (x 〉-3){System.out.printIn ("second");}else{System.out .printIn("third");}要求打印字符串为"second"时,x的取值范围是______。 A: x〈 =0并且x 〉-3 B: x 〉0 C: x 〉-3 D: x〈 =-3

已知下列程序段。if(x>0){ System.out.println("first"); }else if(x>-3){ System.out.println("second"); }else{ System.out.println("third"); }问：x处于 范围时将打印出字符串“second”。（写出区间，行如：[0,8]）

Mary was ______ in the exam. A: a first B: first C: the first D: one

Stephanie fell in love with Alex ______. A: at first sight B: at a first sight C: at the first sight D: at first sights

What is the mindset for China’s energy development? A: quantity first B: quality first C: efficiency first D: price first