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【单选题】
函数y＝C1ex＋C2e﹣2x＋xex满足的一个微分方程是( )．A.
y〞一yˊ－2y＝3xex
B.
y〞－yˊ－2y＝3ex
C.
y〞＋yˊ－2y＝3xex
D.
y〞＋yˊ－2y＝3ex
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反馈参考答案：
举一反三
【简答题】学习本课程后具备的能力?
【单选题】听力原文：M：I really want to buy that hyper-thin laptop，but I don't have enough money this month． W：Well．I had told you to budget your money better．If you listened to me，you are able to buy it． Q：What does...
A.
The man has little money to spend every month.
B.
The man is not careful enough in spending his money.
C.
She doesn't think that laptop is worth buying.
D.
She will lend money to the man to buy that laptop.
【单选题】一 Can't you stay a little longer? I really want to talk more with you. — Me, too. _____ I have to get home before 10 at night. [ ]
A.
But
B.
Since
C.
And
D.
For
【多选题】《建筑消防安全检测评价技术规程》规定，室内消火栓箱安装质量技术应符合下列哪些要求（）
A.
消火栓箱应有明显标记，箱内组件完整，无明显缺陷，开关灵活，无生锈漏水，接口及垫圈无缺陷
B.
栓口与消火栓箱内边缘的距离不应影响消防水带的链接
C.
栓口中心距地面或操作基面高度为1.3m
D.
栓口出水方向应向下或与设置消火栓的墙面平行
【简答题】曲柄压力机小型模具的上模装夹一般用 ,下模则用 。
【单选题】恶心、呕吐和气急等症状,继而出现呛咳、呼吸困难和发绀,进入昏迷状态,继而皮肤上出现血斑。应是
A.
胎盘早剥
B.
胎膜早破
C.
羊水栓塞
D.
先兆子宫破裂
E.
早产
【单选题】I should in this talent show, because I really want to be the winner.
A.
try my best
B.
enjoy myself
C.
play a role
D.
hang out
【单选题】中毒物质不明的病人,用电动吸引法诜胃,下述哪项不妥( )
A.
洗胃液用等渗盐水
B.
电动吸引器压力为13.3kPa(lOOmHg)
C.
插管动作轻快
D.
每次灌入量以200ml为限
E.
洗胃过程病人诉腹痛或流出血性灌洗液，应停止
【单选题】It’s me a lot of time to find out what I really want to do in the future.A．payingB．spendingC．tak
A.
It’s ____ me a lot of time to find out what I really want to do in the future. A．paying
B.
spending
C.
taking
D.
using
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