—When is your birt,hday?
—It ' s _____April 26th. [ ]
A in
B. at
C. on
答案:C
_ eats meat. [ ]
A. The zebra
B. The tiger
C. The kangaroo
D. The panda
用尿糖定性试验检查糖尿病患者和正常成年人各500名,结果糖尿病患者中有300例阳性,200例阴性,正常成年人中有50名阳性,450名阴性。
如果某人尿糖定性试验阳性,其患有糖尿病的可能性为
A.300/350×100/100=85.71%
B.200/450×100/100=44.44%
C.450/500×100/100=90%
D.200/500×100/100=40%
E.300/500×100/100=60%