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【简答题】
Most people who work in the office have a boss (老板). So do I (我也是). But my boss is a little unusual. What's unusual about him? It's a big dog. Many men have dogs, but few men bring their dogs to the office every day. My boss's dog. Robinson, is big and brown. My boss brings him to work every day. He takes the dog to meetings and he takes the dog to lunch. When there is telephone call for my boss, I always know if he is in the office. I only look under his desk. If I see something brown and hairy (的) under it, I know my boss is somewhere in the office. If there is no dog , I know my boss is out. ( )6. People _________bring dogs to the office. A. usually B. often C. seldom (几乎不) ( )7. My boss is Robinson's ________. A. boss B. master C. classmate ( )8. Robinson goes to meetings _________ my boss. A. for B. without C. with ( )9. Robinson is always under the desk if the boss is _________. A. in the office B. at meetings C. out of the office ( )10. The passage tells us the boss _________ the dog very much. A. looks like B. hates (恨) C. likes
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【单选题】一般情况下,作物从土壤中吸收磷素主要通过()。
A.
质流的途径
B.
扩散的途径
C.
接触交换的途径
D.
接触交换和扩散两个途径
【简答题】设,B=P-1AP,其中P为三阶可逆矩阵,则B2004-2A2=______. 分析 本题考查矩阵的运算,主要是利用矩阵乘法的结合设 ,B=P -1 AP,其中P为三阶可逆矩阵,则B 2004 -2A 2 =______。
【单选题】●假设一个6阶的下三角矩阵B按列优先顺序压缩存储在一维数组A中,其中A[0]存储矩阵的第一个元素b11,则A[14]存储的元素是 (52) 。 (52)
A.
b63
B.
b62
C.
b64
D.
b53
【多选题】汽轮机的轴向位置是依靠______确定的?
A.
靠背轮
B.
推力支持联合轴承
C.
支持轴承
D.
推力轴承
【单选题】设三阶矩阵 , ,其中 是三维列向量, , ,则 ( ).
A.
58
B.
60
C.
63
D.
70
【单选题】一般情况下,作物从土壤中吸收磷素主要是通过()。
A.
质流
B.
扩散作用
C.
接触交换
D.
扩散和接触交换
【判断题】平法的创始人是陈青来教授。
A.
正确
B.
错误
【判断题】天南星属和半夏属植物均为单性花,雌雄同株。( )
A.
正确
B.
错误
【单选题】一般情况下,作物从土壤中吸收磷素主要通过
A.
质流的途径
B.
扩散的途径
C.
接触交换的途径
D.
扩散和接触交换两个途径
【单选题】设有一个对称矩阵A,采用压缩存储的方式,将其下三角部分以行序为主序存储到一维数组B中(数组下标从1开始),B数组共有55个元素,则该矩阵是( )阶的对称矩阵。(矩阵中的第1个元素是a1,1 )
A.
5
B.
20
C.
10
D.
15
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