Look at the sign. The library is _____ (close) from 1:00 p.m to 2:00 p.m.
√4的算术平方根为_________。
Ice-cream and candies are not healthy food.They ale u_____ food
函数y=1/3x^3-x的单调减少区间为______.
()1. Could you help me， please?A. OK.
()2. Thanks a lot.B. You're welcome.
()3. Let's put the books in the box.C. It's Monday.
()4. Can you carry it?D. No ，it's full.
()5. Who's on duty today?E. lam.
()6. Is it empty?F. No ，it's light.
()7. What day is it today?G. Certainly.
()8. Is that bag heavy?H. No. Li Lei isn't here. .
()9. Are we all here today?I. No ，thanks.
()10. Let me help you.J. Yes，I can.
把3/20化成小数是 ________，把 0.6 化成分数是 ________.
swim_______ (现在分词)
This book is the lightest and ______ (thin) of all the books.
在一次有 12 人参加的数学测试中，得 100 分， 95 分， 90 分， 85 分， 75 分的人数分别是1,3,4,2,2，那么这组数据的众数是____分
设函数y=sin(x-2)，则y"=（）