（2015•四川达州）—Excuse me， could you please tell me the way to the ？ I have had too much water.—Go along the street and you will find one.
A：bedroom
B：living room
C：classroom
D：restroom
在“中学生营养日”活动中，专家提出：大力宣传普及营养科学与食品卫生知识，扫除“营养盲”在我国城乡已成当务之急．你认为下列观点正确的是（ ）
①关节面上有一层光滑的关节软骨
②关节囊为坚韧的结缔组织
③关节腔内有关节囊内壁分泌的滑液
④关节囊外有坚韧的韧带
