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【简答题】
固溶强化是指溶质原子溶入 , 使其 和 升高
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【简答题】平面任意力系具有 个独立的平衡方程;平面汇交力系具有 个独立的平衡方程;空间力系具有 个独立的平衡方程。
【单选题】Under the influence of Ezra Pound, Hilda Doolittle became associated whit the Imagists and _____ into one of the most original poets of the group.
A.
developed
B.
who developed
C.
to be developing
D.
developing it
【单选题】What time does the woman ask the man to come to the office?
A.
At 9:00 on Tuesday.
B.
At 9:00 on Wednesday.
C.
At 10:00 on Wednesday.
【单选题】What does 'the 9:25 train' refer to?
A.
The train will leave the station at 9:25.
B.
The train will arrive at the station at 9:25.
C.
Passengers should board the train at 9:25.
D.
Passengers should get off in Oxford at 9:25.
【简答题】平面任意力系有____个独立的平衡方程,平面汇交力系有____个独立的平衡方程,平面平行力系有____个独立的平衡方程,平面力偶系有____个独立的平衡方程。
【单选题】What is Cas9 and what does it do?
A.
an RNA molecule that binds to target DNA via complementary base pairing
B.
a DNA sequence that binds the Cas9 protein
C.
a viral protein that disrupts bacterial membranes
D.
a protein enzyme that cuts both strands of DNA at sites specified by an RNA guide
【简答题】平面任意力系独立的平衡方程有______个,可解______个未知量的问题
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