three__________ (序数词 )

This book is the lightest and ______ (thin) of all the books.

()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.

潭中鱼可百许头，__________。(柳宗元《小石潭记》 )

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

What ’s the w_____ like in spring? It's warm

结合全文，说明文中“窗子”的含意

he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.

化合物 W可用作高分子膨胀剂，一种合成路线如下：

图中有① ________ 个三角形，② ________ 个长方形，③ ________ 个梯形.