试题与答案

有如下复数类的声明,请补充完整。 class complex { double r

题型:填空题

题目:

有如下复数类的声明,请补充完整。 class complex { double real; //实部 double imag; //虚部 public: complex(double x,double y) {real=x;imag=y; } complex operator +(complex c) { //重载加法运算符"+"return complex( 【13】 ); } };

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D

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A.临床症状持续超过1小时且神经影像学检查有明确病灶者也可称为短暂性脑缺血发作

B.发作持续数分钟,通常在30分钟内完全恢复,超过2小时常有轻微神经缺损表现或CT及MRI显示脑组织缺血征象

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E.TIA定义时限为6小时内恢复

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It’s all annual back-to-school routine. One morning you wave goodbye, and that (1) evening you’re burning the late-night oil in sympathy. In the race to improve educational standards, (2) are throwing the books at kids. (3) elementary school students are complaining of homework (4) What’s a well-meaning parent to do.As hard as (5) may he, sit back and chill, experts advise. Though you’ve got to get them to do it, (6) helping too much, or even examining (7) too carefully, you may keep them (8) doing it by themselves. "I wouldn’t advise a parent to check every (9) assignment," says psychologist John Rosemond, author of Ending the Tough Homework. "There’s a (10) of appreciation for trial and error. Let your children (11) the grade they deserve. " Many experts believe parents should gently look over the work of younger children and ask them to rethink their (12) . But "you don’t want them to feel it has to be (13) ," she says.

That’s not to say parents should (14) homework-first, they should monitor how much homework their kids (15) . Thirty minutes a day in the early elementary years and an hour in (16) four, five, and six is standard, says Rosemond. For junior-high students it should be " (17) more than an hour and a half," and two for high school students. If your child (18) has more homework than this, you may want to check (19) other parents and then talk to the teacher about (20) assignments.

18()

A.previously

B.rarely

C.merely

D.consistently

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