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问题
选择题
He will come on time _____ it rains.
A. ever since
B. now that
C. even though
D. as if
答案
答案:
C
解答题
解分式方程:
(1)
1-x
2-x
-3=
1
x-2
(2)
x
x-6
=
x-2
x-3
.
查看答案
单项选择题 A1/A2型题
能够激活补体替代途径的免疫球蛋白是()
A.IgG2
B.IgM
C.IgG3
D.IgA聚合物
E.IgG1
查看答案