右图是元素周期表的一部分,各元素在周期表中的位置如下,据此回答下列问题: aeg

题型:问答题

问题:

右图是元素周期表的一部分,各元素在周期表中的位置如下,据此回答下列问题:

a
egij
bcdfhkl
(1)下列各组元素中最容易形成离子键的是______,最容易形成共价键的是______

A、c和h     B、b和k    C、e和j      D、e和i

(2)下列由a~k形成的各分子中,所有原子都满足最外层电子数8电子结构的是______

A、ga3     B、ak   C、hk3   D、ek4

(3)请用化学方程式解释下列现象

①玻璃容器不能盛放j的氢化物的水溶液:______

②b的氧化物对应的水化物溶液不能贮存在d制品中:______.

考点:元素周期表元素周期律
题型:问答题

前置胎盘时,期待疗法适用于:

A.妊娠37周以前

B. * * 出血不多

C.胎儿存活

D.已临产

E.估计胎儿体重<2300g

题型:问答题

阿伏加德罗常数给出物质的量的“标准1”,即1 mol具体代表多少粒子。显然粒子数与物质的量成比例。 已知amolH2SO4中含有b个氧原子,则阿伏加德罗常数可以表示为[ ]

A.

B.

C.

D.

题型:问答题

Name: Container Gardens by Number

Cover price: $l5.95

Our price: $9.49

A unique book contains 50 easy-to-follow container designs. Each design provides a simple numbered planting plan that shows exactly how to create each display, with an instruction of the finished planter and in-depth plant information. The plans are easy to follow and for any type of living space or garden.

Name: Off the Beaten Path

Cover price: $30.00

Our price: $l9.80

The best-selling Reader’s Digest travel book has 40% new content including over 200 new sites, over 200 new full-color photographs, and all-new, up-to-date maps. It spotlights over l, 000 of the United States’ most overlooked must-see destinations.

Name: l80l Home Remedies (疗法)

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Our price: $29.96

Plenty of health complaints can be handled at home. Each and every remedy will be tested by a doctor to make sure it is safe and sound.

Dozens of conditions are covered, from headaches, sunburn, bad breath, and blisters(水泡) to allergies(过敏), and hiccups(打嗝).

Name: Best Weekend Projects

Cover price: $l7.95

Our price: $l3.96

Choose from 80 unique ideas to create an extraordinary living space. The projects are practical, as well as attractive, and will improve your home and yard and can be made in a weekend. These 80 well-designed projects are presented in a clear, easy-to-follow style that addresses readers in an accessible, user-friendly tone.

小题1: You can most probably read the passage in a ___________.

A.news story

B.travel guide

C.newspaper

D.telephone book小题2: How much money can you save if you want to buy a medical book?

A.$6.46.

B.$l0.20.

C.$l3.96.

D.$l0.04.小题3:Which of the following can you afford if you have only $10?

A.Off the Beaten Path

B.Container Gardens by Number

C.l80l Home Remedies

D.Best Weekend Projects小题4:The author writes the passage in order to ___________.

A.persuade readers to buy the books

B.encourage readers to read more about medicine

C.introduce the books to readers

D.develop people’s reading habit

题型:问答题

南沙参的质地特征是()

A.返砂

B.抽沟

C.毛笔头

D.青皮白口

E.松泡

题型:问答题

在高速公路上除遇障碍、发生故障等必须停车外,不准停车上下人员或者装卸货物。

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