试题与答案

PLI=2() A.牙颈部连续窄带状菌斑染色宽度不超过1mm B.菌斑染色覆盖面积占

题型:单项选择题 B1型题

题目:

PLI=2()

A.牙颈部连续窄带状菌斑染色宽度不超过1mm

B.菌斑染色覆盖面积占牙面2/3或2/3以上

C.牙颈部菌斑染色覆盖面积超过1mm,但少于牙面1/3

D.菌斑染色覆盖面积至少占牙面1/3,但不超过2/3

E.牙颈瓿龈缘处有散在的点状菌斑染色

答案:

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Sometimes they write to their parents in America. They tell them about China and their life in China. They all like living here . They want their parents to come to China one day.

小题1:Alice , Tom and Jim come from               .

A.England

B.Europe

C.the USA

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A.Four.

B.Five

C.Six

D.Seven小题3:Why do they go to their Chinese friends’ home on weekends?

A.They want to eat Chinese food at their homes.

B.They want to play with them.

C.They want to make friends with their parents.

D.They want to learn Chinese from them.小题4:Where are Alice’s parents?

A.In America.

B.In England.

C.In China.

D.We don’t know.小题5:What do Alice, Tom and Jim write to their parents in the letters?

A. Something about China.              B.Their life in China.

C. To ask their parents to come to China.    D.A,B and C.

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