题目内容：
—My mother still went to work yesterday ______she didn't feel well.
A whether B though C as soon as D while
参考答案：
答案解析：
选择题：—My mother still went to work yesterday ______she didn't feel well.
- 题目分类： 大学英语B级
- 题目类型：选择题
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锅炉给水经（）提高水温后，进入汽包。A．省煤器B．空气预热器C．汽包D．过热器
锅炉给水经（）提高水温后，进入汽包。A．省煤器B．空气预热器C．汽包D．过热器
John was busy, ______he could not come.A but B therefore C and D nor
John was busy, ______he could not come.A but B therefore C and D nor
—Mathematics ______ study or science of numbers.A is B are C was D were
—Mathematics ______ study or science of numbers.A is B are C was D were
—Listen! Who ______ in the next room? The voice is so beautiful.A sings B sang C
—Listen! Who ______ in the next room? The voice is so beautiful.A sings B sang C
试比较R-选择和K-选择的主要特征。
试比较R-选择和K-选择的主要特征。