“生产成本”账户期末借方余额表示()。A．生产成本 B．生产费用 C．产成品成本 D

氟烷麻醉引起血压下降的原因是直接扩张血管平滑肌。

三个连续整数中，n是最小的一个，这三个数的和为（    ）。

图中西侧山脉和东侧河流构成了我国重要的地理分界线，下列描述正确的是

A．东侧河流是黄河

B．400毫米等降水量线大致与该线吻合

C．甲乙两地耕地都为水田

D．甲地为北方地区，乙地为南方地区

Animals ...............................................93 - 496
Automobile Travel, Highways ............................ 131- 141
Economics .............................................. 80 - 103
Educational Statistics ................................. 286- 321
Environment ............................................ 489- 496
First Aid .............................................. 1040
National Defense ....................................... 497- 510
National Parks .......................................... 747- 749
Passports ............................................... 142 -144
Patents, Copyright Laws.................................. 339- 340
Personal Finance ........................................ 55 - 79
Population, U.S ..........................................1 46-220
Presidential Elections ...................................766 -793
Social Security ...........................................56 - 61
Sports ............................................... 884- 978
Space Developments ........................................... 482
Taxation ............................................... 55 - 69
Theatre, Opera, Films .....................................470-477
Trade and Transportation ................................119- 141
United Nations ..........................................621- 624
U.S. Government ................................ 796 -800,818 -821
Washington, The Nation’s Capital......................... 688 -694

美国人口 ( )联合国

优美、回报和得失是指形成人际关系的具体条件中的（）

A.相互接触

B.相互近似

C.相互悦纳

D.相互补充