下列哪种说法是正确的？（）。①增速避让行动是违背《内河避碰规则》规定的；②增速避让是

秒摆的周期为______；摆长约为______．

下列句子和原文完全一致的是[ ]

A、江涫清秋，晨起看竹，烟雾日影露起。

B、胸中勃发，遂有画意。

C、因而磨墨展纸落笔，倏作变相。

D、淡淡疏密，短长肥瘦，随手写去，自尔成局

清扫运行设备和二次回路时，要防止振动，防止误碰，若使用包有铁皮的木质毛刷就一定要是长毛、长手柄的。（ ）

Optimism is the art of always seeing the glass half full (1) half empty, finding something positive in even the most (2) of situations and last but not least the ability to expect the best even if the chances are (3) . It enables you to try new things, deal with failure as a learning experience (4) a stopping point. In general optimism gives you a reason to live. The world would be a better place if it was full of optimism, (5) unfortunately the trend in today’s youth is (6) the opposite way. Today it is (7) to be pessimistic. One could spend hours discussing how we arrived at this point, (8) our youth refuses to smell the roses and instead prefers to (9) themselves on their own pessimistic (10) .

Optimism is not an (11) gift but rather a learned behavior (12) . Like most behaviors optimism is best learned by watching examples, (13) you. The first step in creating a generation of people with a positive outlook on life, is to (14) life on the bright side yourself. (15) it would be wrong to (16) your child from all negativity, it is important that you are not the (17) of doubts and worries. Finding something positive in a negative situation needs to be (18) Show how to make the best of things by always (19) the positive, by encouraging your child after a(n) (20) and by explaining over and over that failure is just a part of progress.

3（）

A.exotic

B.temporary

C.dim

D.few

抽提原料中溴价变化对产品有何影响？