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【判断题】
反映多种项目或变量综合变动的相对数称为数量指标。A.
正确
B.
错误
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【简答题】Input a number n (for example n=4),n is use to control the rows, output the picture like below. * ** *** ****
【单选题】What is the maximum number of electrons that can exist in an atom with principal quantum number n=3 and magnetic quantum number m_l=1?
A.
0
B.
2
C.
4
D.
6
【单选题】(7分55秒-8分9秒)When Bill Gates says “...But we need to get going, because time is not on our side. ” He actually means that_______.
A.
We might feel panic in the face of pandemics
B.
We might have to hoard cans of spaghetti or go down into the basement.
C.
Investing more money in pandemics should be a priority.
D.
What money can’t buy is time, so we need to respond to pandemics as early as possible.
【简答题】List all the possible subshells and orbitals associated with the principal quantum number n,if n=4
【单选题】对于一个三位的正整数 n,取出它的十位数字k的表达式是( )。Given a number n with 3 integer numbers, the expression to fetch the 2 nd number.
A.
int k = n / 10
B.
int k = ( n - n / 100 * 100 )%10
C.
int k = n % 10
D.
int k = n / 10 % 10
【单选题】关于圆柱螺旋压缩弹簧,说法正确的是( )。
A.
不论左旋还是右旋,均画成右旋
B.
不论弹簧支承圈数是1、1.25、2.5圈,均按实际结构绘制
C.
弹簧支承圈是弹簧受力时起作用的圈数
D.
装配图中被弹簧挡住的结构必须画出
【简答题】Match a word or phrase from A and B and complete sentences 1─8. A collect / consider / do / estimate / forecast / keep within / meet / rearrange B costs / information / our budget / sales / some re...
【单选题】What is the total number of orbitals associated with the principal quantum number n = 4 ?
A.
16
B.
32
C.
8
D.
4
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