两秒规则的作用是确保驾驶员在不同速度下保持与前车的安全距离。该规则的原理是选择前方固定参考物,当车辆通过该点时开始计时,若在2秒内到达同一位置,则跟车距离不足。无论车速快慢,时间固定,因此适应不同速度下的距离调整。选项A正确描述了其用途,其他选项未提供,但题目完整且答案明确。因此答案为A。反馈 收藏...
The 5-Second Rule suggests food is OK to eat if you pick it up 1 five seconds or less. Believe it or not, scientists have tested the rule. We’re sorry to report it’s not necessarily true. Bacteria can attach 2 (it) to your food instantly, regardless of how quickly it 3 (pick...
We’ve just installed two air-conditioners in our apartment, ___should make great differences in our life next summer. [A] which B. what C. that D. they Firms that use computers have found that the number of staff ___is needed for quality control can be substantially reduced. [D...
The most successful social leisure activities share two traits. First, they require you to spend time with other people in person. The second trait is that the activity provides some sort of structure for the social...
In Fig. 26–3 are shown two points, A and B, and a plane mirror, MM′. What is the way to get from A to B in the shortest time? The answer is to go straight from A to B! But if we add the extra rule that the light has to strike the mirror and come back in the ...
1. The second rule is to remember that even in this age of credit (信用) cards, it is still important to have some local money in cash. 相关知识点: 试题来源: 解析 答案见上[.1. credit[提示:句意:要记住的第二条规则是即使在信用 卡时代,有一些当地的现金仍然很重要。credit card信 用卡...
5-second rule: what's the truth? Almost everyone has dropped some food on the floor and still wanted to eat it. If someone saw you drop it, he or she might have shouted, "5-second rule!" This so-called rule says food is OK to eat if you pick it up in five seconds or less....
be compounded at the end of every year. The second column shows the number of years it will take for the investment to double in value. The third column is always 72 because that’s how the formula works. The investment rate multiplied by the number years is always equal to seventy-two...
which have costed projects, but have not filed the paperwork, may need to go back and submit fresh estimates, says Marcus Jefford of Build Aviator.Materials prices are already up 25% in the last two years. How much overall prices will increase as a result of the rule changes is not ...
1 第四句When debates in any sector move beyond the halls of universities and government agencies, there is potential for information to be used incorrectly, leading to public confusion; yet, open debate can also promote communication between the scient...