“天宫一号”某次变轨,离地高度由200km升至362km,假定变轨前后均做匀速圆

题型:选择题

问题:

“天宫一号”某次变轨,离地高度由200km升至362km,假定变轨前后均做匀速圆周运动,变轨后“天宫一号”的

A.加速度增大

B.周期变小

C.线速度变小

D.向心力变大

考点:人造地球卫星
题型:选择题

一个报表最多可以对( )个字段或表达式进行分组。

A.4

B.6

C.8

D.10

题型:选择题

急性化脓性脑膜炎并发硬脑膜下积液时,以下哪项不符()

A.它是婴儿化脓性脑膜炎常见的并发症

B.积液可以是无菌性渗出液

C.常发生于经特效治疗后脑脊液好转,但体温持续不退或退后又回升

D.以肺炎双球菌及流感杆菌脑膜炎为多见

E.已明确是不恰当治疗的结果

题型:选择题

可燃气体、易燃液体和温度超过闪点的液体的泄漏,都会在漏出的区域或漏出的液面上产生可燃(爆炸)性混合物。

题型:选择题

在四种不同的薪酬策略中,企业最常用的方式是( )。

A.滞后型策略

B.混合型策略

C.领先型策略

D.跟随型策略

题型:选择题

(A) 条件(1)充分,但条件(2)不充分.
(B) 条件(2)充分,但条件(1)不充分.
(C) 条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
(D) 条件(1)充分,条件(2)也充分.
(E) 条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.

Every student graduating from Burgerville College is either a 4-year student or a transfer student. If Burgerville is graduating an equal number of 4-year students and transfer students, what fraction of the students who graduate with honors are transfer students
(1) Of the 700 transfer students graduating, 300 are graduating with honors.
(2) Fifty percent more transfer students than 4-year students are graduating with honors.

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