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【单选题】
给出下列说法： （1）两条直线被第三条直线所截，同位角相等； （2）平面内的一条直线和两条平行线中的一条相交，则它与另一条也相交； （3）相等的两个角是对顶角； （4）从直线外一点到这条直线的垂线段，叫做这点到直线的距离． 其中正确的有（ ）A.
0个
B.
1个
C.
2个
D.
3个
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举一反三
【简答题】The finance director of AQR Co has heard that the market value of the company will increase if the weighted average cost of capital of the company is decreased. The company, which is listed on a stock...
【单选题】The earth is about _______as the moon.
A.
as forty-nine time big
B.
forty-nine times as big
C.
as big forty-nine times
D.
forty-nine as times big
【单选题】Prices are always rising these days. Up to now, the petrol price _______ 20%.
A.
increased by
B.
increased to
C.
has increased to
D.
has increased by
【单选题】Which of the following is mentioned as an example of achievements in health care?
A.
Increasing budget and attention.
B.
Preferential tax policy and incentives.
C.
Decreasing mortality rate and medicine price.
D.
Ratio of hospital beds to patient.
【判断题】网状数据模型的结构简单、清晰、明朗，很容易看到各个实体之间的联系，但是修改数据时，具有较多严格的限制，例如删除父节点，那么其下的所有子节点都要同时删除。
A.
正确
B.
错误
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