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【单选题】
已知旋转矩阵R=-0.4330 0.8660 0.2500 利用matlab工具箱计算其等效转轴，-0.7500 -0.5000 0.43300.5000 0.0000 0.8660转角为以下哪个选项？A.
2.133522 [0.255977 0.147788 0.955319]
B.
3.141593 [0.866025 0.500000 0.000000]
C.
2.773493 [0.694747 0.186157 0.694747]
D.
1.637834 [ -0.250563 0.935113 0.250563]
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皮皮学刷刷变学霸
举一反三
【多选题】In dynamic programming:
A.
some answers are pre-computed and stored in a table
B.
is a table look-up approach
C.
a cheat sheet is necessary
D.
memorisation of facts is important
【多选题】系统中各杆都为均质杆。已知杆 OA , CD 质量各为 m ,杆 AB 质量为 2 m ,且 OA = AC = CB = CD = L ,杆 OA 以角速度 w 转动,则图示瞬时, OA 杆动量的大小为____________; AB 杆动量的大小为___________; CD 杆动量的大小为______________。
A.
B.
C.
D.
【单选题】下列有关支气管舒张实验的描述 错误的 是
A.
通常可在FEV1/FVC＜70%可选择做舒张试验；
B.
用以测定气道的可逆性；
C.
吸入支气管舒张剂后评价；
D.
若FEV1较用药前增加≥12%则为支气管舒张试验阳性；
E.
若FEV1用药后较用药前增加≥12%,且绝对值增加≥200ml,则为支气管舒张试验阳性；
【简答题】dynamic programming
【单选题】Dynamic Programming can be described as:
A.
A reductionist method because the problem size is reduced in each step until it becomes small enough to be tackled easily
B.
A constructivist method because we work on small problems first and then build up solutions of larger problems
C.
A parallel processing method because we work on multiple parts of the problem simultaneously
D.
None of the options given
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