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路货车重点故障中各杠杆、拉杆故障包括哪些内容？

答案

参考答案：

下拉杆安全吊或索脱落、丢失；基础制动装置各拉杆、杠杆、圆销折断、丢失；基础制动装置吊架破损、脱落；下拉杆下垂超限。

单项选择题

2015年2月．美国高通公司宣布，已同意向中国发改委支付60．88亿元（约合9．75亿美元）罚款，了结为期14个月的反垄断调查，对高通公司的处罚体现下面的哪一原则？（）

A.非歧视原则

B.市场准人原则

C.互惠原则

D.公平竞争原则
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单项选择题

In fall 2006, the National Basketball Association (NBA) started using basketballs made with synthetic, or man-made, material instead of leather. They made the change because they wanted every basketball they use to feel and bounce the same. Not all leather balls are exactly alike in weight or how they bounce, but the synthetic balls are.
However, some players complained right away that the new balls bounced differently and were actually harder to control than the leather ones.
Physics helped answer questions about why the new balls felt different. For example, the scientists studied friction, which in this case affects the ability of a player to hold onto a ball. "The greater the friction, the better it will stick to his hand," explains a scientist.
Tests on both wet and dry balls showed that while the synthetic ball was easier to hold onto when dry, it had less friction and became much harder to hold onto when wet. That’s because sweat stays on the surface of the synthetic balls but gets taken into the leather balls.
The scientists also tested bounce and found that the logo printed on the new balls made their surface uneven and caused them to bounce a little strangely compared with the leather balls.
In January, the NBA went back to using the leather balls. They aren’t perfect, but for now, that’s just the way the ball bounces.

The underlined word "They" in the last paragraph refers to ______.

A．the synthetic balls

B．the leather balls

C．the ball players

D．the scientists
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