消化性溃疡死亡的主要原因 ()
A.十二指肠球部溃疡周边黏膜充血水肿所致
B.十二指肠球部溃疡反复发作瘢痕形成或粘连所致
C.急性穿孔
D.慢性穿孔
E.癌变
参考答案:C
()指标从投资者角度评价渠道效益。
A.渠道销售增长率
B.渠道销售利润率
C.渠道费用利润率
D.资产利润率
The four years, from 1860 to 1864 ___ Lincoln spent fighting for freedom of the slaves is the time ___ the American people will never forget.
A.when; when
B.which ; that
C.when; which
D.which; when