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【单选题】
关于人体标准解剖学姿势描述错误的是A.
身体直立,面向前
B.
两眼向正前方平视
C.
两足并立,足尖向前
D.
上肢下垂于躯干两侧
E.
掌心向内
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【简答题】Fill in each blank with one suitable word from the list below, Each word in the list can be used once only. a actually bite catch caught dearest deep deeply dice distre evidence. ...
【简答题】Fill in each blank with one suitable word from the list below, Each word in the list can be used once only. a actually bite catch caught dearest deep deeply dice distre evidence. ...
【简答题】设x，y，z∈R且x+2y+3z=1 （I）当z=1，|x+y|+|y+1|＞2时，求x的取值范围； （II）当x＞0，y＞0，z＞0时，求 u= x 2 x+1 + 2 y 2 y+2 + 3 z 2 z+3 的最小值．
【简答题】Directions: In this part there are two passages followed by questions or unfinished statements, each with four suggested answers marked A, B, C and D. Choose the one that you think is the best answer....
【简答题】设函数u 1 =u 1 (x，y，z)与u 2 =u 2 (x，y，z)均满足拉普拉斯方程△u=0．试证明函数v=u 1 (x，y，z)+(x 2 +y 2 +z 2 )u 2 (x，y，z)满足方程△(△v)=0．
【单选题】1 New technology often creates unanticipated problems. 2 Automobiles, for ex- ample, provide numerous benefits, but they also pollute the air and kill about fifty thousand Americans each year. 3 It is...
A.
1
B.
2
C.
3
D.
4
E.
5
【单选题】在复平面内，设向量 p 1 =( x 1 ， y 1 )， p 2 =( x 2 ， y 2 )又设复数 z 1 = x 1 + y 1 i； z 2 = x 2 + y 2 i（x 1 ，x 2 ，y 1 ，y 2 ∈R），则 p 1 ? p 2 等于（ ）
A.
. z 1 z 2 + z 1 . z 2
B.
. z 1 z 2 - z 1 . z 2
C.
1 2 （ . z 1 z 2 - z 1 . z 2 ）
D.
1 2 （ . z 1 z 2 + z 1 . z 2 ）
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