以观赏叶色、叶形为主的花卉,属于()花卉。
A.观花类
B.观叶类
C.观果类
D.观茎类
参考答案:B
— You seem to know much about the city.
— That’s true. I_____ it five times in the past two months.[ ]
A. visited
B. am visiting
C. have visited
D. will visit
对关节的描述,正确的是()
A.关节面表面有一层纤维软骨覆盖
B.所有关节均有关节盘
C.关节囊的纤维膜与滑膜之间腔隙称为关节腔
D.关节腔内为负压,并有少量滑液
E.所有关节均有囊内韧带