古蔡法检查砷盐时，供试品的砷斑颜色比标准品的颜色浅，说明砷盐含量未超限。
参考答案：对
We thought there were 35 students in the dining hall, ______, in fact, there were 40.
A．while
B．whether
C．what
D．which
与男性型秃发的发生可能有关的因素是（）
A.雄激素的作用
B.雌激素的作用
C.甲状腺功能亢进
D.甲状腺功能减退
E.皮脂腺分泌过多
