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问题 填空题
从方框中选出与下列各句中画线部分意思相同或相近，并能替换画线部分的选项。
A.around   B.found   C.boring  D.provided
( )1. The speech was so dull that it made most of us sleepy.
( )2. Lin Fei goes to school at about 7 every day.
( )3. At that time Town Cinema was the cheapest ,but it had the friendliest service.
( )4. Sarah discovered that it was important for a flight attendant to speak English well.
答案

1-4  CADB

选择题

关于实现下列物品用途的主要物质的说法，不正确的是（　　）

 选项 A B C D
 物品 

 

 

 

 用途 化学能转化为电能 吸附水分 去除油污光能转化为电能 
 主要物质H2 SO4（aq）是电解质溶液 硅酸干凝胶是主要成分 硬脂酸钠是主要成分 SiO2是转换材料

A．A

B．B

C．C

D．D
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单项选择题

冠龈边缘过长的主要临床表现是

A．边缘可探间隙

B．就位困难

C．戴入后压迫牙龈苍白

D．外形凸

E．固位差
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