CT值定为0的组织是
A.空气
B.脂肪
C.水
D.骨
E.脑组织
参考答案:C
The boy went swimming in the deep lake his mother's fears for his safety. [ ]
A. in the face of
B. as a result of
C. regardless of
D. in spite of
The colonial life can be described as the following except ()
A.simple
B.easy
C.rough
D.hard