铊（Tl）是某超导材料的组成元素之一，与铝同族，位于第6周期。Tl3+与Ag在酸性介质中发生反应：Tl3++2Ag====Tl++2Ag+。下列推断正确的是（ ） A.Tl+的
You’re in a department store and you see a couple of attractive young women looking at a sweater. You listen to their conversation: “I can’t believe it—a Lorenzo Bert
从方框中选择适当的词完成短文。 think，shops, take, because, many, other, a lot, popular, find, and. In England, people like eating fish and chips very much. Th
下列关于变异的叙述，正确的是（ ） A．变异对生物都是有利的 B．变异都是可遗传的 C．变
读下图，回答（1）～（3）题。（1）受暖流影响明显的地方是 A.T B.Q C.R D.S （2）气候特点为“冬季温和多雨、夏季炎热干燥”的地方
A young man and an old man were waiting for a bus at a station. They sat _1__ each other. “What’s that in your bag?” asked the young man, pointing to a big bag beside the ___2__.“Money, nothin
如图所示是日光灯的结构示意图，若按图示的电路连接，关于日光灯发光的情况，下列叙述中正确的是( ) A．S1接通，S2、S3断开，日光灯就能正常发光B
