为了夜晚开灯方便，小明想设计一个带指示灯开关的电路，主要元件由照明灯L₁、阻值比L₁阻值大很多的指示灯L₂、及两个开关S₁、S₂构成．要求当开关S₁、S₂闭合时，照明灯L₁发光，指示灯L₂不发光；当开关S₁闭合、S₂断开时，照明灯L₁不发光，指示灯L₂发光．在图所示的四个电路中，符合上述设计要求的是（　　）

下列有关人体结构与功能的叙述，错误的是（　　）

2016年9月17 日新京报报道，中秋节蟹肥时，螃蟹成为餐桌上烘托节日气氛的不二之选。但是如果你此时在餐桌上看到阳澄湖大闸蟹，那一定是假货。因为2016年阳澄湖官方的开湖捕蟹时间是9月23日。尽管如此，假冒阳澄湖大闸蟹的销售渠道不在少数。有的商家明知道阳澄湖大闸蟹还没有上市，但是通过包装和佩戴假冒标签后，普通河蟹摇身一变成为“阳澄湖大闸蟹”。上述商家行为侵犯了消费者的（    ）

①知悉真情权   ②自主选择权   ③公平交易权   ④依法求偿权

    Honey(蜂蜜）from African(非洲）forest is very delicious.

    Most people and many animals like eating it. However, the only way for them to get that honey is to find a wild bees' nest(蜂巢）and take honey from it. Often, these nests are high up in trees, and it is difficult to find them. But in parts of Africa, people and animals have a strange helper — a little bird called a honey helper.

    In fact, the honey helper does not like honey, but it likes the wax(蜂蜡）in the nest. The little bird cannot reach the wax because it is inside the bees' nest. So, when it finds a nest, it looks for someone to help. The little bird sings loudly to get the attention(注意） of both passing animals and people. When it has their attention, it flies through the forest, waiting for the following animal or person that loves honey. Then it helps them find the nest. When they finally arrive at the nest, the follower tries to get the delicious honey and the bird waits and watches. Some of the honey and the wax always fall to the ground, and this is when the bird takes its share.

    Scientists do not know why the bird likes eating the wax, but they seem to be able to smell the wax far away.