The following data sufficiency problems co

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问题:

The following data sufficiency problems consist of a question and two statements, labeled (1) and (2), in which certain data are given. You have to decide whether the data given in the statements are sufficient for answering the question. Using the data given in the statements plus your knowledge of mathematics and everyday facts (such as the number of days in July or the meaning of counterclockwise), you must indicate whether.

If w+x+y=42, what is the value of wxy ?()
(1) x and y are consecutive odd integers
(2) w=2x

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

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题型:单项选择题

如图所示,一个竖直放置的圆锥筒可绕其中心轴OO′转动,筒内壁粗糙,筒口半径和筒高分别为R和H,筒内壁A点的高度为筒高的一半. 内壁上有一质量为m的小物块.求:  

(1)当筒不转动时,物块静止在筒壁A点受到的摩擦力和支持力的大小;

(2)当物块在A点随筒做匀速转动,且其所受到的摩擦力为零时,筒转动的角速度.

题型:单项选择题

如图所示,A、B为两个等量的正点电荷,在其连线中垂线上的P点放一个负点电荷q(不计重力),由静止释放后,下列说法中正确的是(  )

A.点电荷在从P点到O点运动的过程中,加速度越来越大,速度越来越大

B.点电荷在从P点到O点运动的过程中,加速度越来越小,速度越来越大

C.点电荷运动到O点时加速度为零,速度达最大值

D.点电荷越过O点后,速度越来越小,加速度越来越大,直到粒子速度为零

题型:单项选择题

某研究性小组在室外测得一日内的气温如下表,

据表回答1-2题。

1.根据上述材料推算,该地日平均气温是[ ]

A.8℃

B.9℃

C.10℃

D.12℃

2.请你计算出该地的气温日较差是[ ]

A.2℃

B.6℃

C.8℃

D.10℃

题型:单项选择题

冲渣泵运行中的检查有哪些方面?

题型:单项选择题

国产操作系统包括()。

A.Windows 7

B.Deepin

C.中标麒麟

D.阿里云

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