题干

下列叙述中,错误的是

A:原子半径 Cl>S>O

B:还原性 Na>Mg>Al

C:稳定性 HF>HCl>HBr

D:酸性 HClO4>H2SO4>H3PO4

上一题 下一题 0.0难度 选择题 更新时间:2019-10-16 09:24:04

答案(点此获取答案解析)

A

同类题4

    配对阅读,第一栏是五个人物想要做的事情,第二栏是七个物品的简介。请为每个人选择最合适的物品。

C

⑴Andy likes music and outdoor sports. He would like something that can bring him beautiful songs on his journey, especially when he is camping or hiking.____

⑵Pierre likes travelling. Now he decides to ride his bike around the world. But he is afraid to be lost during his travelling. He would like something to help him.____

⑶Rita likes parties. She likes to look smart and she is very fond of dancing. She says that she wants to learn some kinds of dance.____

⑷Harry is a quiet boy. He doesn't like to exercise or travel, but he likes cooking very much. He likes to read cooking books which can help to make cooking interesting and easy.____

⑸Ellen will have his summer holiday. He wants to improve his English during the holiday. He says to his father he needs a machine which can help him study English.____

A. Dance style Jazz. The DVD will teach beginners Jazz dance at home. It teaches you moves and steps carefully. Just follow and practice, you will be a good Jazz dancer.

B. The MP3 player can just fit right into your pocket. It has a smart earphone which lets you listen to your favorite singer, even when you are on a journey.

C. Learn to Play the Guitar is a step-by-step guidebook. It can help beginners learn to be a skillful guitar player in a short time.

D. Let's Cook contains delicious, easy-to-follow recipes that are perfect for young cooks. The book makes sure that children will have fun while cooking some of their favorite foods.

E. Shenzhou netbook not only lets you surf the Internet but also helps you study. It has lots of English movies and English teaching programs. So it's a good help to students who want to learn English.

F. The traveler's compass(指南针). Wherever you go, the instrument will help you to know where you are.

G. WheeMe is a massage(按摩)robot which looks like a tiny car. It has four wheels that are supposed to gently massage a person's body. It can roll around without falling of the user.