现有四种说法:①-a表示负数;②若|x|=-x,则x<0;③绝对值最小的有理数是0;④3×102x2y是5次单项式;其中正确的是 [ ]
A.①
B.②
C.③
D.④
答案:C
What has happened to the capital flow into the emerging market economies a. It has become difficult to get foreign direct investment. b. Banks no longer offer any loans. c. Portfolio investment has increased. d. Those market economies didn’t take advantage of different kinds of capital.
男性,36岁。12小时前工作中突然出现右上腹痛,继之出现豆油色尿,半小时前出现上腹痛向腰背部放散,俯首弯腰查减轻腹痛,血压 120/180mmHg,呼吸18次/分。
下列诊断哪项可能性最大( )
A.急性胆囊炎
B.急性胰腺炎
C.肾绞痛
D.阑尾穿孔
E.肠系膜血管栓塞