如图所示，请画出宣传牌所受重力G的示意图，并画出以B为支点宣传牌静止时所受的另一个力F及其力臂L．

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新修订的《中华人民共和国老年人权益保障法》已于2013年7月1日起施行。该法明确规定：“家庭成员应当关心老年人的精神需求，不得忽视、冷落老年人。”“与老年人分开居住的家庭成员，应该经常看望或者问候老年人。”上述规定（   ）

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   "Let's go to the petting zoo(抚爱式动物园)!"said Bonk．
    "First, let's get some food for the animals.” said Lurk．
    "I'm so happy we can feed the animals．"said Uzzle．
    "I'll get carrots for the horses．"said Lurk．
    "I'll get cabbages for the chickens．"said Uzzle．
    "I'll get corn(玉米)for the sheep，"said Bonk．
    At the zoo，Bonk put some of the corn in his bag．His bag had a small hole(洞)，but Bonk didn't know about it．Bonk and his friends played with the animals and fed them．Bonk forgot about the corn.
    On the way home，the corn dropped(落下)out．One of the sheep at the zoo followed the corn to Bonk's home．Before Bonk and his friends said goodbye to each other, they saw the sheep．
    "How do we get him back to the zoo?"asked Bonk．
    Bonk and his friends did everything．But the sheep just didn't move．
   "Mr. Sheep?" said Lurk．"You need to go back to the zoo."The sheep didn't move．
    "I know what will work!"said Bonk．Bonk put the corn along the road to the petting zoo and let the sheep eat it．The sheep moved when he ate the corn．At last ,the sheep was back at the zoo．
    "Baa!"said the sheep．
    "You're welcome．"said Bonk.
根据材料内容简要回答下列问题。

已知$f\left(x\right)=\left\{\begin{array}{c}(3a-1)x+4a,(x<1)\\ \log a^x,(x\ge 1)\end{array}\right.$是$\left(-\infty ,+\infty \right)$上的减函数，那么a的取值范围是（　 ）

把肯定句改成否定句

①他这样做虽然过分了点，但还是有道理的。

②他见义勇为的行为，让我们深受感动。