设，则supE=（）。

A.2xe^2x

B.4xe^2x

C.2x²e^2x

D.2xe^2x(1+x)

B.a=-4,b=6,c=1

C.a=-6,b=4,c=0

D.a=-2,b=4,c=0

接下来最应采取的措施是（）

A. 心电图

B. B.1周后复查血脂

C. C.检查血糖

D. D.胸部X线片

E. E.口服调脂药

(1)(3x²+6xy²)dx+(6x²y+4y²)dy=0

(2)(a²-2xy-y²)dx-(x+y)²dy=0(a为常数)

(3)e^ydx+(xe^y-2y)dy=0

(4)(xcosy+cosx)y'-ysinx+siny=0

(5)(x²-y)dx-xdy=0

(6)y(x-2y)dx-x²dy=0

(7)(1+e^2θ)dp+2pe^2θdθ=0

(8)(x²+y²)dx+xydy=0

Premier Co acquired 80% of Sanford Co on 1 June 20X1. Sales from Sanford Co to Premier Co throughout the year ended 30 September 20X1 were consistently $1 million per month. Sanford Co made a mark-up on cost of 25% on these sales. At 30 September 20X1 Premier Co was holding $2 million inventory that had been supplied by Sanford Co in the post-acquisition period.By how much will the unrealised profit decrease the profit attributable to the non-controlling interest for the year ended 30 September 20X1?

A、$80,000

B、$82,000

C、$70,000

D、$72,000

Annie is a sole trader who does not keep full accounting records. The following details relate to her transactions with credit customers and suppliers for the year ended 30 June 20X6: $ Trade receivables, 1 July 20X5 130,000 Trade payables, 1 July 20X5 60,000 Cash received from customers 686,400 Cash paid to suppliers 302,800 Discounts allowed 1,400 Discounts received 2,960 Contra between payables and receivables ledgers 2,000 Trade receivables, 30 June 20X6 181,000 Trade payables, 30 June 20X6 84,000 What figure should appear for purchases in Annie’s income statement for the year ended 30 June 20X6?

A、$325,840

B、$330,200

C、$331,760

D、$327,760

a.土生土长的外国人：

b.外国土地所有者：

c.留在国内的工人;

d.国内土地所有者：

e.移民工人。

从墨西哥向美国移民的效应研究发现：移民者是最大的赢家。用上面的例子说明这一结论。如果无移民限制，即边界开放，情况会怎么样呢?

The statistics from exercise 1: supposing there is a restriction in the immigration， only two workers are allowed to immigrate. Please figure out the influence on the next five group people by these two immigrant workers.

a. Workers originally in Foreign

b. Foreign landowners

c. Workers staying at home

d. Home landowners

e. Immigrant labour

Judging from the research of the effects by the immigration from Mexico to America， the immigrant is the biggest winner. Please use the above example， if there is no restriction in the immigration， that is open-border， how will be the situation?