油田生产动态分析针对单井，油藏动态分析侧重于（）。A、井组 B_爱下问搜题

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问题多项选择题

油田生产动态分析针对单井，油藏动态分析侧重于（）。

A、井组

B、单井

C、区块

D、油田

答案

参考答案：A, C, D

补全对话，情景问答

从方框中选择合适的选项完成对话。
A: Hi,l'm doing a survey for the Bedford Daily News. __1__
B: I guess Jammin 107 FM is the best..
A: Why?
B: __2__ It's much better than the other stations in town.
A: What about the other radio stations?
B: Well,l think Oldies 102.1 FM is very bad. __3__
A: I heard that. __4__
B: Not for me.
A: Why not?
B: __5__ They're worse than the commercials of All Talk 970 AM!

A. Because it has the best clothing.
B. It has the worst music.
C. What's the best clothing store?
D. Because it has the most interesting music.
E. But Easy Listening 979 is the most popular.
F. Just listen to their commercials.
G. What's the best radio station?

选择题

下表是一辆电动自行车的部分技术指标，其中额定车速是指电动车满载情况下在平直道路上以额定功率匀速行驶的速度。

电源输出电压

出功率

电动机额定工

作电压和电流

请参考表中数据，完成下列问题（g取10 m/s²）：

（1）此车所配电动机的内阻是多少？

（2）在行驶过程中电动车受阻力是车重（包括满载重）的k倍，试计算k的大小。

（3）若电动车满载时在平直道路上以额定功率行驶，且阻力大小恒定，当车速为3m/s时，加速度为多少？