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搜题
【单选题】
存在微分方程Y''-XY'+Y=1; X=0时,Y为0;X=2时,Y也为0。求X=0.9时,Y的值?A.
-0.9462
B.
-1.3786
C.
-1.4731
D.
-1.3186
E.
-0.8893
F.
-0.9955
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皮皮学刷刷变学霸
举一反三
【单选题】Jinmay O’Bfien
A.
Overfishing results from extensive use of new technologies．
B.
Many people in my place support stricter regulation on fishing．
C.
I think that you failed to point out the real reason for overfishing．
D.
We are in a very weak position to compete with other countdes in fishing．
E.
Sooner or later，we will feel regretful about out current fishing practice．
F.
I didn’t know there were such damaging ways of fishing around the world．
G.
I wonder if those fishermen have ever considered the consequences of exhausting ocean resources．
【单选题】患者,女,56岁。自感乏力,有口渴感,消瘦,空腹血糖值14.5mmol/L,诊断为糖尿病。其可能是由哪种激素分泌不足引起
A.
胰高血糖素
B.
胰岛素
C.
肾上腺素
D.
糖皮质激素
E.
褪黑素