血浆钙离子是凝血因子中的第几因子（）
A.Ⅰ
B.Ⅱ
C.Ⅲ
D.Ⅳ
E.Ⅴ
参考答案：D
小麦在（）期后一般不再吸收钾。
After graduation from college, he began to go from city to city, _____ a suitable job. [ ]
A. searching for
B. taking on
C. looking after
D. bringing up
