问题
单项选择题
皮肤科门诊中，常常见到女性因使用化妆品不当而导致皮肤病。以下化妆品中最易引起变应性接触性皮炎的是（）
A.香水
B.洗面奶
C.防裂霜膏
D.浴液
E.护发素
答案
参考答案：A
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皮肤科门诊中，常常见到女性因使用化妆品不当而导致皮肤病。以下化妆品中最易引起变应性接触性皮炎的是（）
A.香水
B.洗面奶
C.防裂霜膏
D.浴液
E.护发素
参考答案：A
Electronic books have changed the way many people read for 15 . Now online textbooks are changing the way some students learn and some teachers teach. More than 16 students go to the public schools in Fairfax County, Virginia, outside Washington. Last year, the school system used digital books in fifteen schools. This school year, middle schools and high schools changed 17 printed to electronic textbooks in their social studies classes. “I mean, it’s just 18 a regular textbook, except it’s got it all online.” says Luke Rosa, a history teacher at Falls Church High School. Peter Noonan, an assistant superintendent(主管) of schools says, “The world’s changing 19 . And the online textbooks can change right along with the events that 20 .” “Digital books also cost 21 than printed textbooks,” he says, “Usually it’s between fifty and seventy dollars 22 a textbook for each student, which adds up to about eight million dollars for all of our students in Fairfax County. In fact, we have bought all of the online textbooks for our students for just under six million dollars.” Social studies teacher Michael Bambara says the e-book he uses in his government class is better than a(an) 23 textbook. It has materials for students 24 different levels of reading skills…
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