计算机网络的体系结构是指网络的层次及其()的集合。
A.设备
B.软件
C.协议
D.规则
参考答案:C
Dear Jenny,
Please take these things to your brother: his math book, baseball, notebook, CDs, and video tape. The math book is on the dresser. The baseball is under the bed. The notebook is on the bed. The CDs are in the drawer. The video tape is on the table. Thanks!
Mom
小题1:Where is the math book?
A.It’s on the dresser.
B.It’s under the bed.
C.It’s on the bed.
D.It’s in the drawer.小题2:What’s under the bed?
A.The math book.
B.The baseball.
C.The notebook.
D.The CDs.小题3:The math book is .
A.Jenny’s
B.Mom’s
C.Jenny’s brother’s
D.Tom’s小题4:The are in the drawer.
A.rulers
B.books
C.CDs
D.pens小题5:The video tape is .
A.on the table
B.under the table
C.under the bed
D.on the bed
诊断牙龈有无炎症的重要指标是
A.附着龈的点彩消失
B.牙龈溢脓
C.牙龈发红
D.探诊后出血
E.龈沟液量增加