解剖式牙的牙尖斜度为()半解剖式牙的牙尖斜度为()非解剖式牙的牙尖斜度为()
A.0度
B.10度
C.20度
D.30度
E.40度
参考答案:D,C,A
海带只能生活在浅海区,不能生活在深海区,影响海带分布的非生物因素主要是( )
A.阳光
B.水分
C.空气
D.温度
35. ______ in a shower on his way to his house in Lloyd Road, a tall English gentleman began running in order to catch a bus going at full speed about twenty yards ahead of him.
A.Caught
B.Catching
C.Having caught
D.Having been caught