题干
When you are swimming, ________ your ears.You can use earplugs (耳塞) to stop water getting into your ears.
A：take after
B：take part in
C：take off
D：take care of
答案(点此获取答案解析）
D
的生命。医院人满为患，“非典”与“发热”与“疑似”混杂在一起，让医生难以区分。我国科学工作者，日夜奋战，利用基因工程迅速研制出“非典”诊断盒。其作用及机理是（ ）
