皮皮学，免费搜题
登录
搜题
【判断题】
一般来说,径向柱塞泵比轴向柱塞泵的径向尺寸要大。A.
正确
B.
错误
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】what is an effective way to shorten the distance
A.
smiling and shaking hands
B.
eye-contacting
C.
being polite
D.
being professional
【判断题】Smiling and shaking hands are appropriate when you meet the interviewer for the first time.
A.
正确
B.
错误
【单选题】It’s a refreshing change to see a losing team shaking hands and still smiling after a match. 看到输球的球队队员依然面带微笑跟对手握手,真是令人耳目一新。
A.
pleasantly stimulating
B.
wonderfully sweet
C.
extremely innovative
【单选题】What elements are NOT part of a good first impression?
A.
Keeping things positive.
B.
Making eye contact, smiling and shaking hands.
C.
Getting to know someone by talking with them again.
D.
Straightening your posture and leaning in slightly.
【判断题】Shaking hands, smiling, and saying “hi” or “nihao” is the most usual way to greet people in China. Use “nin hao” to greet older Chinese people.
A.
正确
B.
错误
【多选题】(多选)如图甲所示,倾角为θ的足够长的传送带以恒定的速率v 0 沿逆时针方向运动.t=0时将质量m=1kg的物体(可视为质点)轻放在传送带上,物体相对地面的v-t图象如图乙所示.设沿传送带向下为正方向,取重力加速度g=10 m/s 2 .则( )
A.
传送带的速率v 0 =10 m/s
B.
传送带的倾角θ=30°
C.
物体与传送带之间的动摩擦因数μ=0.5
D.
1.0~2.0 s物体不受摩擦力
【单选题】如图所示,倾角为 θ 的足够长传送带沿顺时针方向转动,转动速度大小为 v 1 ,一个物体从传送带底端以初速度大小 v 2 ( v 2 > v 1 ) 上滑,同时物块受到平行传送带向上的恒力 F 作用,物块与传送带间的动摩擦因数 μ = tan θ ,最大静摩擦力等于滑动摩擦力,则下列物块运动的 v t 图象 不可能 是 ( )
A.
如A
B.
如B
C.
如C
D.
如D
相关题目：
参考解析：
知识点：
题目纠错 0
发布
