可用超声观察区别的眼眶组织有(). ①眼球壁 ②眼球内容物 ③视神经间隙 ④眶内脂肪组织 ⑤眼外肌
A.①②
B.①②③
C.①②③④
D.①②③④⑤
E.②③④
参考答案:D
The village is ________ on all sides by green mountains, which is rich in natural resources.[ ]
A. surrounded
B. covered
C. divided
D. depended
导游人员在工作中应当少饮或不饮酒,饮酒时的量不要超过自己酒量的( )。
A.1/2
B.1/3
C.1/4
D.1/5