《医疗机构管理条例>规定的医疗机构执业规则与《执业医师法》规定的医师执业规则有许多相

牙根相对较粗大者为（）。

A.上颌中切牙

B.上颌侧切牙

C.下颌中切牙

D.下颌侧切牙

E.上颌尖牙

用所给单词的适当形式填空。

小题1:Would you like ________(sing) an English song for us?

小题2:There were many __________ (visit) at Qingdao Aquarium.

小题3:My friend is _________(good) at writing than reading.

小题4:Yao Ming is one of the best basketball ________ (play) in the world.

小题5:He stayed at home last night and ________(write) some letters.

碳水化合物是构成机体和参与细胞代谢活动的重要物质。

园路横向坡度一般在（）之间，方便排水。

A.1.5~2.5%

B.0.1~0.4%

C.10~40%

D.0.3~8%

我给老师发了电子yóu______件。