30、()

A．VC—AC

B．VC—SIMI

C．PC—BIPAP

D．SPN—CPAP

t to point WAN links. Which of the masks below would you use？

A. /38

B. /30

C. /27

D. /23

E. /18

F. /32

A.3

B.30

C.300

D.3000

有如下程序： #include＜iostream＞ using namespace std； class point { int x，y； public： point(int vx，int vy) { x=vx； y=vy； } point() { x=0； y=0； } point operator+(point p1) { point p； int px=x+p1.x； int py=y+p1.y； return point(px，py)； } point operator-(point p1) { point p； int px=x-p1.x； int py=y-p1.y； return point(px，py)； } void print() { cout＜＜x＜＜","＜＜y＜＜end1； } }； int main() { point p1(10，10)，p2(20，20)； p1=p1+p2； p1.print()； retrun 0； } 执行后的输出结果是

A．10，10

B．20，20

C．10，20

D．30，30

有如下程序：#include ＜iostream＞using namespace std;class point{ int x, y;public: point(int vx, int vy ) { x = vx; y = vy; } point () x = 0; y= 0; } point operator+(point p1 ) { point p; int px = x+ p1.x; int py = y + p1.y; return point(px, py ); point operator-(point p1 ) { point p; int px = x -p1.x; int py = y - p1.y; return point (px, py ); } void print() { cout＜＜x＜＜" , "＜＜y＜＜end1; }};int main (){ point p1(10, 10 ), p2(20, 20 ); p1 = p1 - p2; p1.print (); return 0;} 执行后的输出结果是

A．10，10

B．20，20

C．10，20

D．30，30

有如下程序：#include ＜iostream＞using namespace std;class point{ int x, y;public: point(int vx, int vy ) { X=vx; y=vy; } point() { x=0; y=0; } point operator+ (point p1 ) { point p; int px = x + p1.x; int py = y+ p1.y; return point(px, py ); } point operator-(point p1 { point p; int px = x - p1.x; int py = y - p1.y; return point(px, py ); } void print() { cout＜＜x＜＜","＜＜y＜＜end1; }};int main(){ point p1(10, 10 ), p2(20, 20 ); p1 = p1 + p2; p1.print(); return ();}执行后的输出结果是()。

A．10, 10

B．20, 20

C．10, 20

D．30, 30

有如下程序： #include ＜iostream＞ using namespace std; class point { int x, y; public: point(int vx, int vy ) { x = vx; y = vy; } point () { x = 0; y = 0; } point operator+(point pl ) { point p; int px = x + p1.x; int py = y + p1.y; return point(px, py ); } point operator-(point p1 ) { point p; int px = x - p1.x; int py = y - p1.y; return point(px, py ); } void print() { cout＜＜x＜＜", "＜＜y＜＜end1; } }; int main () { point pl (10, 10 ), p2 (20, 20 ); p1 = p1 + p2; p1.print (); return 0; } 执行后的输出结果是()。

A．10,10

B．20,20

C．10,20

D．30,30

For this part, you are allowed 30 minutes to write an essay commenting on the saying “The decisions that people make quickly are always wrong.” You can give an example or two to illustrate your point of view. You should write at least 150 words but no more than 200 words.

请给出范文，谢谢！

ation explosion by referring to the saying "A wealth of information creates apoverty of attention. " You can give examples to illustrate your point and then explainwhat you can do to avoid being distracted by irrelevant information. You shouldwrite at least 150 words but no more than 200 words. ___________________________________________________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________________________________________________ ___________________________________________________________________________________________________________________________________________________________

When referring to dry bulk cargoes，the term "flow state" ______.

A.designates the state of a commodity when the ship is heeled past the angle of repose

B.relates to the suitability of loading a cargo by flowing down inclined chutes

C.refers to the saturation of a dry bulk product with water to the point where it acts as a liquid

D.relates to the minimum granule size of a particular product where it will flow like a liquid at an angle of 30°

company are both expected to be 200 units in the coming year，the budgemd selling price is$370 per unit．The following information mimes to the costs of producin9 200 toys：

Per unit(＄)

Total(＄)

Direct material costs

l 50

30 000

Direct labor costs

80

1 6 000

Variable production overheads

50

1 0 000

Variable selling and administration overheads

30

6 000

Fixed production overheads

6 000

Fixed selling and administration overheads

3 000

Requirement：

A．Calculate the total contribution margin．

B．Calculate the amounts of profit at the budgeted level of production．

C．Calculate the break-even point in units and the margin of safety．

D．If M company desires a profit of$4 800，calculate the number of units that it must produce and sell．