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【单选题】
Which is not the g rowth habit of tea trees in i nfancy period?A.
It has a strong nutritional growth and an absolute advantage.
B.
Branching mode of branches: uniaxial branching.
C.
Root system: straight root system is dominant, lateral root is few; cuttage is fibrous root.
D.
The shape and size of the tea fruit are related to the number of seeds in the tea fruit.
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【单选题】试问以下程序输出结果正确的是 #include void main() { int a=16,a1,a2,a3; a1=a++; a2=a++; a3=a++; printf("a1=%d,a2=%d,a3=%d\n",a1,a2,a3); a1=++a; a2=++a; a3=++a; printf("a1=%d,a2=%d,a3=%d\n",a1,a2,a3); }
A.
a1=16,a2=17,a3=18 a1=20,a2=21,a3=22
B.
a1=16,a2=16,a3=16 a1=17,a2=17,a3=17
C.
a1=16,a2=17,a3=18 a1=19,a2=20,a3=21
D.
a1=16,a2=17,a3=18 a1=16,a2=17,a3=18
【单选题】设向量a1=(1 2 0)T，a2=(2 3 0)T，a3=(0 1 -1)T，β=(3 5 k)T，若β可由a1，a2，a3线性表示，则k=( )。
A.
1
B.
-1
C.
-2
D.
2
【简答题】证明 (l×p) 2 =(p×l) 2 =-(l×p)·(p×l)=l 2 P 2 -(p×l)·(l×p)=l 2 p 2 +4h 2 p 2
【简答题】证明 r·l=l·r=0，p·l=l·p=0 计算(p×l)或(l×p)和p及l的标积．
【简答题】Two pages of the original manuscript (底稿) of Albert Einstein's General Theory of Relativity were________ on display in the Israel Pavilion of the 2010 World Expo in Shanghai. A．put up B set...
【简答题】若a 2 =1（a＞0），则a=（ ），若a 3 =﹣8，则a=（ ）。
【简答题】Einstein Named "Person of the Century" Albert Einstein, whose theories on space time and matter helped unravel (解决) the secrets of the atom and of the universe, was chosen as "Person of the Century" b...
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