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问题 选择题

这个标志是何含义？

A、禁止直行和向左转弯
B、禁止直行和向左变道
C、允许直行和向左变道
D、禁止直行和向右转弯

答案

参考答案：A

解析：禁止直行和向左转弯：表示前方路口禁止一切车辆直行和向左转弯。此标志设在禁止直行和向左转弯的路口前适当位置。

问答题

Third, we will integrate clean stoves into our international development projects so that refugee camps, disaster relief efforts, and long-term aid programs all will act as distribution networks. Women and girls who are obviously the vast majority of stove users will be our focus throughout. Women-owned, micro-financed businesses and networks can extend deep into hard-to-reach communities, and that I know a number of my friends from SEWA, the Self Employed Women’s Association that started in India, has already made a huge difference for millions of women in India. And they’re with us today; you’ll meet them in a minute. And they’re helping us to make this happen more broadly.
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单项选择题

粗车时，应选择较大的背吃刀量ap和进给量f所以选择切削速度Vc要（）。

A.高些

B.中等速度

C.低些

D.任意
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