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【单选题】
已知矩阵 A <- matrix(1:16,nrow=4)，哪个选项可以得到如下矩阵?1 0 0 00 6 0 00 0 11 00 0 0 16
A.
diag(A)
B.
diag(A)
C.
diag(diag(A))
D.
A[lower.tri(A)]
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参考答案：
举一反三
【单选题】Tim used to ______ in the morning, but now he is used to ______ in the evening. [     ]
A.
read, read
B.
reading, read
C.
read, reading
D.
reading, reading
查看完整题目与答案
【单选题】病毒大小的度量单位是( )
A.
nm
B.
mm
C.
um
D.
cm
查看完整题目与答案
【单选题】He used to _______in the sun，but now he is used to _______at night．A． read read B．
A.
1． He used to _______in the sun，but now he is used to _______at night． A． read read
B.
reading read
C.
read reading
D.
reading reading
查看完整题目与答案
【单选题】He used to in the sun, but now he is used to at night. [     ]
A.
read; read
B.
reading; read
C.
read; reading
D.
reading; reading
查看完整题目与答案
【简答题】在该房屋中1～6层沿地震作用方向的剪力墙连梁LL-1平面如图1-18所示，抗震等级为一级，截面b×h=350mm×400mm，纵筋上、下部各配4 25，h0=360mm；箍筋采用HRB335(fvv=300N/mm2)，截面按构造配箍即可满足抗剪要求。试问，下面依次列出的该连梁端部加密区及非加密区的几组构造配箍，其中哪一组能够满足相关规范、规程的最低要求? 提示：选项中4 ××，代表4肢箍。
查看完整题目与答案
【单选题】HRB400钢筋中的数字400代表下列哪项含义。
A.
钢筋强度的标准值
B.
钢筋强度的设计值
C.
钢筋强度的平均值
D.
钢筋强度的最大值
查看完整题目与答案
【判断题】病毒大小的度量单位是纳米。
A.
正确
B.
错误
查看完整题目与答案
【判断题】PLC的RS触发器功能和电子RS触发器完全一样,都是S端有效触发器置1,
A.
正确
B.
错误
查看完整题目与答案
【判断题】PLC 的 RS 触发器功能和电子 RS 触发器完全一样,都是 S 端有效触发器置 1 , R 端有效复位
A.
正确
B.
错误
查看完整题目与答案
【单选题】&8226;Read this text about FDI. &8226;Choose the best sentence from the sentences that follow to fill each of the gaps. &8226;For each gap 9-14, mark one letter (A-H) on your Answer Sheet. ? Do not us...
A.
Besides, new advanced technology can be introduced to the host country.
B.
On the other hand, local companies can enjoy the advanced technology which they lack.
C.
Therefore, a company will not undertake FDI if it does not see a higher return than it can get at home country and if it does not think it can outperform. local firms.
D.
FDI is especially important to developing countries.
E.
This is particularly true of the less developed countries (LDCs).
F.
Likewise, benefits may arise if the superior management skills of a foreign MNE stimulate local suppliers, distributors, and competitors to improve their own management skills.
G.
Another adv
查看完整题目与答案
相关题目：
【单选题】Tim used to ______ in the morning, but now he is used to ______ in the evening. [     ]
A.
read, read
B.
reading, read
C.
read, reading
D.
reading, reading
查看完整题目与答案
【单选题】病毒大小的度量单位是( )
A.
nm
B.
mm
C.
um
D.
cm
查看完整题目与答案
【单选题】He used to _______in the sun，but now he is used to _______at night．A． read read B．
A.
1． He used to _______in the sun，but now he is used to _______at night． A． read read
B.
reading read
C.
read reading
D.
reading reading
查看完整题目与答案
【单选题】He used to in the sun, but now he is used to at night. [     ]
A.
read; read
B.
reading; read
C.
read; reading
D.
reading; reading
查看完整题目与答案
【简答题】在该房屋中1～6层沿地震作用方向的剪力墙连梁LL-1平面如图1-18所示，抗震等级为一级，截面b×h=350mm×400mm，纵筋上、下部各配4 25，h0=360mm；箍筋采用HRB335(fvv=300N/mm2)，截面按构造配箍即可满足抗剪要求。试问，下面依次列出的该连梁端部加密区及非加密区的几组构造配箍，其中哪一组能够满足相关规范、规程的最低要求? 提示：选项中4 ××，代表4肢箍。
查看完整题目与答案
【单选题】HRB400钢筋中的数字400代表下列哪项含义。
A.
钢筋强度的标准值
B.
钢筋强度的设计值
C.
钢筋强度的平均值
D.
钢筋强度的最大值
查看完整题目与答案
【判断题】病毒大小的度量单位是纳米。
A.
正确
B.
错误
查看完整题目与答案
【判断题】PLC的RS触发器功能和电子RS触发器完全一样,都是S端有效触发器置1,
A.
正确
B.
错误
查看完整题目与答案
【判断题】PLC 的 RS 触发器功能和电子 RS 触发器完全一样,都是 S 端有效触发器置 1 , R 端有效复位
A.
正确
B.
错误
查看完整题目与答案
【单选题】&8226;Read this text about FDI. &8226;Choose the best sentence from the sentences that follow to fill each of the gaps. &8226;For each gap 9-14, mark one letter (A-H) on your Answer Sheet. ? Do not us...
A.
Besides, new advanced technology can be introduced to the host country.
B.
On the other hand, local companies can enjoy the advanced technology which they lack.
C.
Therefore, a company will not undertake FDI if it does not see a higher return than it can get at home country and if it does not think it can outperform. local firms.
D.
FDI is especially important to developing countries.
E.
This is particularly true of the less developed countries (LDCs).
F.
Likewise, benefits may arise if the superior management skills of a foreign MNE stimulate local suppliers, distributors, and competitors to improve their own management skills.
G.
Another adv
查看完整题目与答案
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